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Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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1

Monitoring Molecular Adsorption on High-Area Titanium Dioxide via Modulated Diffraction of Visible Light  

E-Print Network [OSTI]

Letters Monitoring Molecular Adsorption on High-Area Titanium Dioxide via Modulated Diffraction and evaluation of organic chemical adsorption on various titanium dioxide surfaces. The strategy is illustrated thin films of titanium dioxide (TiO2), with micrometer-sized features, were prepared on transparent

2

Sonosynthesis of nano TiO2 on wool using titanium isopropoxide or butoxide in acidic media producing multifunctional fabric  

Science Journals Connector (OSTI)

Abstract This study presents a novel idea to prepare nanocrystalline structure of TiO2 under ambient pressure at 60–65 °C using in situ sonochemical synthesis by hydrolysis of either titanium isopropoxide or titanium butoxide in an acidic aqueous solution. The nano titanium dioxide coated wool fabrics possess significant antibacterial/antifungal activity and self-cleaning property by discoloring Methylene blue stain under sunlight irradiation. This process has no negative effect on cytotoxicity and tensile strength of the sonotreated fabric even reduces alkaline solubility and photoyellowing and improves hydrophilicity. More titanium isopropoxide or titanium butoxide as a precursor led to higher photocatalytic activities of the treated fabrics. Also introducing more ethanol improved the adsorption of TiO2 on the wool fabric surface leading to enhanced photocatalytic activity. EDS and XRD patterns, SEM images, X-ray mapping confirmed the presence of nano TiO2 particles on the fabric surface. The role of both solvent and precursor concentrations on the various properties of the fabric was investigated and the optimized conditions were obtained using response surface methodology.

Amir Behzadnia; Majid Montazer; Abousaeid Rashidi; Mahnaz Mahmoudi Rad

2014-01-01T23:59:59.000Z

3

Direct Compressive Measurements of Individual Titanium Dioxide Nanotubes  

E-Print Network [OSTI]

Direct Compressive Measurements of Individual Titanium Dioxide Nanotubes Tolou Shokuhfar the syn- thesis of TiO2 nanotube arrays using an aqueous HF based electrolyte.5 The pH of F ion containing electrolytes was con- trolled to form nanotubes up to a few mi- crometers in length. They reported

Endres. William J.

4

Properties of Disorder-Engineered Black Titanium Dioxide Nanoparticles through  

E-Print Network [OSTI]

Properties of Disorder-Engineered Black Titanium Dioxide Nanoparticles through Hydrogenation Xiaobo . Hydrogen adsorption was proposed to proceed through molecular H2 dissoci- ation via a hydride intermediate and subsequent migration, and studies of hydrogen adsorption on (TiO2)N clusters revealed that an initial

5

Nano-Enabled Titanium Dioxide Ultraviolet Protective Layers for Cool-Color  

Broader source: Energy.gov (indexed) [DOE]

Nano-Enabled Titanium Dioxide Ultraviolet Nano-Enabled Titanium Dioxide Ultraviolet Protective Layers for Cool-Color Roofing Research Project Nano-Enabled Titanium Dioxide Ultraviolet Protective Layers for Cool-Color Roofing Research Project The Department of Energy (DOE) is currently undertaking research into nano-enabled titanium dioxide (TiO2) ultraviolet (UV) protective layers for cool-color roofing applications. Project Description This project entails optimizing and scaling up silicon dioxide-coated TiO2 nanocrystal synthesis and functionalization in aqueous solution in order to formulate a 10 gallon waterborne clear UV protective nanocomposite coating material. Project Partners This project is being undertaken between DOE and Nanotrons, a Massachusetts-based company that uses nano-engineering technologies to

6

Studying the Mechanisms of Titanium Dioxide as Ultraviolet-Blocking Additive for Films and Fabrics by an  

E-Print Network [OSTI]

Studying the Mechanisms of Titanium Dioxide as Ultraviolet-Blocking Additive for Films and Fabrics November 2003 ABSTRACT: Titanium dioxide (TiO2) has good ultraviolet (UV)-blocking power and is very: inorganic UV-blocking agents; additives; films; adsorption; light scattering INTRODUCTION More frequent

Pan, Ning

7

Adsorption of water and ammonia on TiO2-anatase cluster models Isik Onal a,*, Sezen Soyer a  

E-Print Network [OSTI]

to the surface properties and the adsorption reactions of titanium dioxide-anatase surface. Lin and Bai [3 reserved. Keywords: TiO2; Anatase; Adsorption; Water; Ammonia; DFT 1. Introduction Titanium oxides are usedAdsorption of water and ammonia on TiO2-anatase cluster models Isik Onal a,*, Sezen Soyer a , Selim

Senkan, Selim M.

8

Scanning tunneling microscopy investigation of the TiO2 anatase ,,101... surface Wilhelm Hebenstreit,1  

E-Print Network [OSTI]

of tunneling sites in STM. Titanium dioxide (TiO2) is a versatile material that finds uses as a promoter. Fourfold-coordinated Ti atoms at step edges are preferred adsorption sites and allow the identification

Diebold, Ulrike

9

Small Au and Pt Clusters at the Anatase TiO2(101) Surface: Behavior at Terraces, Steps, and Surface Oxygen Vacancies  

E-Print Network [OSTI]

polymorph of titanium dioxide (TiO2). TiO2 is a versatile oxide material with important applications in many@ecust.edu.cn; diebold@tulane.edu Abstract: The adsorption properties of Au and Pt metal nanoclusters on TiO2 anatase edges. A preference for adsorption at type D-(112) steps is observed, which is probably a result

Diebold, Ulrike

10

Enhanced light-conversion efficiency of titanium-dioxide dye-sensitized solar cells with the addition of  

E-Print Network [OSTI]

Enhanced light-conversion efficiency of titanium- dioxide dye-sensitized solar cells attributed to a slightly enhanced dye-adsorption behavior and a change in the TiO2 surface chemistry due oxide have been studied to modify the surface chemistry through pH changes to enhance the adsorption

Cao, Guozhong

11

Surface studies of nitrogen implanted TiO2 Matthias Batzill a,*, Erie H. Morales b  

E-Print Network [OSTI]

.V. All rights reserved. Keywords: Titanium dioxide; Doping; Nitrogen; Surface science 1. IntroductionSurface studies of nitrogen implanted TiO2 Matthias Batzill a,*, Erie H. Morales b , Ulrike Diebold Available online 3 August 2007 Abstract Rutile TiO2(110) single crystals have been doped by nitrogen

Diebold, Ulrike

12

The influence of surface conductivity on the apparent zeta potential of TiO2 nanoparticles  

E-Print Network [OSTI]

Titanium dioxide is widely used as TiO2 nanoparticles and has a large variety of potential applications in of these properties, the surface ionization of titanium dioxide nanoparticles in contact with an electrolytic solution is a physico-chemical parameter of particular importance to describe ion adsorption and electrostatic

Paris-Sud XI, Université de

13

Oxidative Degradation of BPA Using TiO2 in Water, and Transition of Estrogenic Activity in the Degradation Pathways  

Science Journals Connector (OSTI)

The oxidative degradation behavior of bisphenol A (BPA) using titanium dioxide (TiO2...) in water was investigated. The main purposes were to clarify the relationship with estrogenic activity from the degradation...

Kei Nomiyama; Teiji Tanizaki; Toyokazu Koga…

2007-01-01T23:59:59.000Z

14

Influence of anode area and electrode gap on the morphology of TiO2 nanotubes arrays  

Science Journals Connector (OSTI)

In order to fabricate the titanium dioxide (TiO2) nanotubes arrays which were used in the photocatalytic degradation of total volatile organic compounds (TVOC) by anodization, the influence of the electrode gap and anode area on the morphology ...

Min Wang; Li Jia; Shuangmei Deng

2013-01-01T23:59:59.000Z

15

Preparation of K2Ti6O13/TiO2 bio-ceramic on titanium substrate by micro-arc oxidation  

Science Journals Connector (OSTI)

K2Ti6O13/TiO2 bio-ceramic coatings are prepared successfully by micro-arc oxidation on titanium substrate in pure KOH electrolyte...2) and in KOH electrolyte with different concentrations (0.5–1.2 mol/L). The com...

Zhongwei Zhao; Xingyu Chen; Ailiang Chen; Guangsheng Huo…

2009-12-01T23:59:59.000Z

16

Reaction of titanium polonides with carbon dioxide  

SciTech Connect (OSTI)

It has been ascertained that heating titanium and tantalum in carbon dioxide to temperatures of 500 or 800/sup 0/C alters the composition of the gas phase, causing the advent of carbon monoxide and lowering the oxygen content. Investigation of the thermal stability of titanium polonides in a carbon dioxide medium has shown that titanium mono- and hemipolonides are decomposed at temperatures below 350/sup 0/C. The temperature dependence of the vapor pressure of polonium produced in the decomposition of these polonides in a carbon dioxide medium have been determined by a radiotensimetric method. The enthalpy of the process, calculated from this relationship, is close to the enthalpy of vaporization of elementary polonium in vacuo.

Abakumov, A.S.; Malyshev, M.L.; Reznikova, N.F.

1987-05-01T23:59:59.000Z

17

Carrier Localization and Cooling in Dye-Sensitized Nanocrystalline Titanium Dioxide Gordon M. Turner, Matthew C. Beard, and Charles A. Schmuttenmaer*  

E-Print Network [OSTI]

dem- onstrated solar-to-electric energy conversion efficiencies of 10.4%.2 The TiO2 nanoparticles#12;Carrier Localization and Cooling in Dye-Sensitized Nanocrystalline Titanium Dioxide Gordon M-induced carrier localization and/or backscattering of the photogenerated carriers. In addition, the carriers

18

Array of titanium dioxide nanostructures for solar energy utilization  

DOE Patents [OSTI]

An array of titanium dioxide nanostructures for solar energy utilization includes a plurality of nanotubes, each nanotube including an outer layer coaxial with an inner layer, where the inner layer comprises p-type titanium dioxide and the outer layer comprises n-type titanium dioxide. An interface between the inner layer and the outer layer defines a p-n junction.

Qiu, Xiaofeng; Parans Paranthaman, Mariappan; Chi, Miaofang; Ivanov, Ilia N; Zhang, Zhenyu

2014-12-30T23:59:59.000Z

19

Glutamate Surface Speciation on Amorphous Titanium Dioxide and  

E-Print Network [OSTI]

Glutamate Surface Speciation on Amorphous Titanium Dioxide and Hydrous Ferric Oxide D I M I T R I (HFO) and titanium dioxide exhibit similar strong attachment of many adsorbates including biomolecules on amorphous titanium dioxide. The results indicate that glutamate adsorbs on HFO as a deprotonated divalent

Sverjensky, Dimitri A.

20

Functionality of nano titanium dioxide on textiles with future aspects: Focus on wool  

Science Journals Connector (OSTI)

The consumption of titanium dioxide in today's world is on the increase. As the most popular nano substance, TiO2 is used in various industries notably in the textile industry. More and more recently, through a synergistic combination of photocatalytic features of nanoparticles, fabrics with novel properties are produced. Self-cleaning and stability against UV rays as well as chemical media, to name but a few, are among new prominent properties, obtained on textiles. A common subject reported in most studies has been the diverse approaches to immobilize the nanoparticles on the surface of fabrics. Wool is among common textile materials that have undergone numerous processes to be modified. This review intends to bring to light different aspects of application of nano titanium dioxide in the textile industry especially on wool, and also presents a concise overview on the rigorous pieces of research conducted in this realm.

Majid Montazer; Esfandiar Pakdel

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Study of Interfacial Charge-Transfer Complex on TiO2 Particles in Aqueous Suspension by Second-Harmonic Generation  

E-Print Network [OSTI]

/mol. 1. Introduction Titanium dioxide (TiO2) is a wide band-gap semiconductor having two common crystal, the adsorption isotherm of catechol on the colloidal TiO2 suspension was obtained and gave an excellent fit to the Langmuir adsorption model. From this, we infer the free energy of the adsorption to be G° ) -6.8 kcal

Eisenthal, Kenneth B.

22

Building Technologies Office: Nano-Enabled Titanium Dioxide Ultraviolet  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nano-Enabled Titanium Nano-Enabled Titanium Dioxide Ultraviolet Protective Layers for Cool-Color Roofing Research Project to someone by E-mail Share Building Technologies Office: Nano-Enabled Titanium Dioxide Ultraviolet Protective Layers for Cool-Color Roofing Research Project on Facebook Tweet about Building Technologies Office: Nano-Enabled Titanium Dioxide Ultraviolet Protective Layers for Cool-Color Roofing Research Project on Twitter Bookmark Building Technologies Office: Nano-Enabled Titanium Dioxide Ultraviolet Protective Layers for Cool-Color Roofing Research Project on Google Bookmark Building Technologies Office: Nano-Enabled Titanium Dioxide Ultraviolet Protective Layers for Cool-Color Roofing Research Project on Delicious Rank Building Technologies Office: Nano-Enabled Titanium Dioxide

23

Method for synthesis of titanium dioxide nanotubes using ionic liquids  

SciTech Connect (OSTI)

The invention is directed to a method for producing titanium dioxide nanotubes, the method comprising anodizing titanium metal in contact with an electrolytic medium containing an ionic liquid. The invention is also directed to the resulting titanium dioxide nanotubes, as well as devices incorporating the nanotubes, such as photovoltaic devices, hydrogen generation devices, and hydrogen detection devices.

Qu, Jun; Luo, Huimin; Dai, Sheng

2013-11-19T23:59:59.000Z

24

Optimisation of Accurate Rutile TiO2 (110), (100), (101) and (001) Surface Models from Periodic DFT Calculations  

E-Print Network [OSTI]

For years, the titanium dioxide, TiO2, has been widely used as a white pigment and opacifier. Its recent of pseudopotentials was studied and it appears that four valence electrons for titanium atoms are sufficient. The aim and inorganic molecules adsorption [14-21], have been also studied and the surface chemistry on this phase has

Paris-Sud XI, Université de

25

Role of Benzyl Alcohol in Controlling the Growth of TiO2 on Carbon Nanotubes David J. Cooke,*,  

E-Print Network [OSTI]

. Introduction Titanium dioxide (TiO2) is one of the most important transition-metal oxides with applications. First, the interface between graphene and BA, where we found that the adsorption layer is dominated interaction with the titanium sol.12,19 Such groups are commonly attached via covalent bonding upon

Elliott, James

26

The deposition of nanocrystalline TiO2 thin film on silicon using Sol-Gel technique and its characterization  

Science Journals Connector (OSTI)

TiO"2 thin films were deposited using Sol-Gel spin coating technique using titanium isoperoxide as the Titania precursor. The films were characterized using X-ray diffraction, capacitance voltage measurement and Raman characterization technique. The ... Keywords: Sol-Gel, Spin coating, Titanium dioxide, X-ray diffraction

Mukesh Kumar; Mukesh Kumar; Dinesh Kumar

2010-03-01T23:59:59.000Z

27

The surface science of titanium dioxide Ulrike Diebold*  

E-Print Network [OSTI]

The surface science of titanium dioxide Ulrike Diebold* Department of Physics, Tulane University, New Orleans, LA 70118, USA Manuscript received in final form 7 October 2002 Abstract Titanium dioxide is reviewed on the adsorption and reaction of a wide variety of inorganic molecules (H2, O2, H2O, CO, CO2, N2

Diebold, Ulrike

28

Dry etching properties of TiO2 thin films in O2/CF4/Ar plasma  

Science Journals Connector (OSTI)

In this work, the etching properties of titanium dioxide (TiO2) thin film in additions of O2 at CF4/Ar plasma were investigated. The maximum etch rate of 179.4 nm/min and selectivity of TiO2 of 0.6 were obtained at an O2/CF4/Ar (=3:16:4 sccm) gas mixing ratio. In addition, the etch rate and selectivity were measured as a function of the etching parameters, such as the RF power, DC-bias voltage, and process pressure. The efficient destruction of the oxide bonds by ion bombardment, which was produced from the chemical reaction of the etched TiO2 thin film, was investigated by X-ray photoelectron spectroscopy. To determine the re-deposition of sputter products and reorganization of such residues on the surface, the surface roughness of TiO2 thin film were examined using atomic force microscopy.

Kyung-Rok Choi; Jong-Chang Woo; Young-Hee Joo; Yoon-Soo Chun; Chang-Il Kim

2013-01-01T23:59:59.000Z

29

Titanium dioxide based high temperature carbon monoxide selective sensor  

E-Print Network [OSTI]

Titanium dioxide based high temperature carbon monoxide selective sensor Nancy O. Savagea , Sheikh as a trap for the oxidation products of CO and CH4. Upon oxidation of CO on ALC, carbonate species were detected, whereas the reaction of CH4 produced negligible carbonate species. The insensitivity of the ALC

Dutta, Prabir K.

30

Distributed feedback laser biosensor incorporating a titanium dioxide nanorod surface  

E-Print Network [OSTI]

Distributed feedback laser biosensor incorporating a titanium dioxide nanorod surface Chun Ge,1 emission wavelength is modulated by the adsorption of biomolecules, whose greater dielectric permittivity- dimensional volume overlap between the DFBLB resonant mode and the region where biomolecule adsorption can oc

Cunningham, Brian

31

Structure and dynamics of liquid water on rutile TiO2(110) Li-Min Liu, Changjun Zhang, Geoff Thornton, and Angelos Michaelides  

E-Print Network [OSTI]

those between water and titanium dioxide TiO2 . Water-TiO2 interfaces are relevant to photocatalysis on which adsorption state the water molecules are in at the interface: dissociated or molecular? Many, density-functional theory DFT studies predict either molecular or dissociative adsorption on the perfect

Alavi, Ali

32

TiO2-assisted degradation of a perfluorinated surfactant in aqueous solutions treated by gliding arc discharge  

Science Journals Connector (OSTI)

The plasma–chemical degradation of Forafac 1110, a perfluorinated non-ionic surfactant, in aqueous solutions was investigated using TiO2 catalysts. The considered plasma was the gliding arc in humid air, which results from an electric discharge at atmospheric pressure and quasi-ambient temperature. Two titanium dioxide powders were used and their synergistic effects on the Forafac degradation were compared. The results were discussed through the evolution of the pH, the conductivity, the fluoride ions concentration released in solutions, the surfactant concentration remaining after treatment and the chemical oxygen demand (COD) measurement. The combination of the plasma–chemical treatment with heterogeneous catalysis through the use of TiO2 accelerated the Forafac degradation, since only 60 min was sufficient to remove 96% instead of 360 min needed in the absence of TiO2. The use of anatase and rutile under the trade-name of Rhodia TiO2 and Merck TiO2, respectively, led to different results, because Rhodia TiO2 has proven to be more efficient. It would seem that the crystalline phase as well as the crystallite size, explain the efficiency of anatase. The advantage of the plasma-catalysis is due to the fact that there is a significant production of the OH• radicals not only generated by the gliding arc discharge but also by TiO2.

Kheira Marouf-Khelifa; Fatiha Abdelmalek; Amine Khelifa; Ahmed Addou

2008-01-01T23:59:59.000Z

33

The Synthesis of Ag-Doped Mesoporous TiO2 . | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Synthesis of Ag-Doped Mesoporous TiO2 . The Synthesis of Ag-Doped Mesoporous TiO2 . Abstract: Ag-doped mesoporous titanium oxide was prepared using non-ionic surfactants and...

34

The Synthesis of Cadmium Doped Mesoporous TiO2. | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Synthesis of Cadmium Doped Mesoporous TiO2. The Synthesis of Cadmium Doped Mesoporous TiO2. Abstract: Cd doped mesoporous titanium oxide was prepared using non-ionic...

35

Fretting Wear Study on Micro-Arc Oxidation TiO2 Coating on TC4 Titanium Alloys in Simulated Body Fluid  

Science Journals Connector (OSTI)

Tribological properties of TiO2 coatings synthesized by micro-arc oxidation (MAO) on the surface of TC4...2 coatings presented good tribological properties with lower friction coefficient in SBF. Less wear volume...

Guanghong Zhou; Hongyan Ding; Yue Zhang; Aihui Liu; Yuebin Lin…

2010-12-01T23:59:59.000Z

36

Dye Sensitization of Nanocrystalline Titanium Dioxide with Osmium and Ruthenium Polypyridyl Complexes  

E-Print Network [OSTI]

dioxide electrodes.2-4 The highest efficiency reported to date for such systems has been obtained using conversion efficiencies of up to 10% have been reported.4 The approximate energetics for this system while maintaining the excited-state redox potential at the same energy level relative to the TiO2 can

Sauvé, Geneviève

37

Enhanced power conversion efficiency of dye-sensitized solar cells with multifunctional photoanodes based on a three-dimensional TiO2 nanohelix array  

Science Journals Connector (OSTI)

Abstract Developments of metal oxide nanostructures for simultaneous improvements in light harvesting and charge collection can lead to a significant technical progress in various applications such as photoelectrodes for photoelectrochemical cells and various types of solar cells. Here we present an array of three-dimensional titanium dioxide (TiO2) nanohelixes infiltrated with TiO2 nanoparticles as a multifunctional photoanode for dye sensitized solar cells (DSSCs). The unique geometry and the near-single crystallinity of the vertically aligned TiO2 nanohelix array results simultaneously in strong light scattering and enhanced carrier transport and collection, while maintaining a comparable surface area accessible for dye molecules by the infiltrated TiO2 nanoparticles. Consequently, despite a ~40% reduction in dye loading, the overall photon conversion efficiency of the DSSC with the nanoparticle-infiltrated nanohelix-array photoanode is enhanced by 6.2% in comparison with the DSSC with the conventional nanoparticle photoanode.

Seung Hee Lee; Jeong Kwon; Dong Yeong Kim; Kyung Song; Sang Ho Oh; Jaehee Cho; E. Fred Schubert; Jong Hyeok Park; Jong Kyu Kim

2015-01-01T23:59:59.000Z

38

One-Dimensional Titanium Dioxide Nanomaterials: Nanowires, Nanorods, and Nanobelts  

E-Print Network [OSTI]

.1.1. Hydrothermal/Solvothermal Methods G 4.1.2. Sol-Gel Methods H 4.1.3. Surfactant-Assisted Methods I 4.1.4. Microwave Assisted Methods J 4.1.5. Sonochemical Synthesis K 4.1.6. High Temperature Pyrolysis K 4.1.3. TiO2 NW Heterostructures V 5.2. 1D TiO2 Nanostructures in Photovoltaics X 5.2.1. Dye-Sensitized Solar

Wang, Xudong

39

Neutron reflectometry characterization of interface width between sol-gel titanium dioxide and silicon dioxide thin films  

SciTech Connect (OSTI)

Neutron reflectometry (NR) was used to directly measure the interface width between a titanium dioxide and a silicon dioxide film deposited by sol-gel processing. In a bilayer heated to 450 C, NR measurements showed that the interface width is 0.8 nm. This width is the same as the roughness of a sol-gel silicon dioxide surface after the same heat treatment, suggesting no interdiffusion or mixing at the bilayer interface.

Keddie, J.L.; Norton, L.J.; Kramer, E.J.; Giannelis, E.P. (Cornell Univ., Ithaca, NY (United States). Dept. of Materials Science and Engineering)

1993-10-01T23:59:59.000Z

40

Role of ethylene on surface oxidation of TiO2(110) Y. Murata, V. Petrova, I. Petrov, C. V. Ciobanu, and S. Kodambaka  

E-Print Network [OSTI]

Institute of Physics. [http://dx.doi.org/10.1063/1.4767954] Transition-metal (TM) oxides,1 notably titanium dioxide (TiO2),2­4 have a wide variety of applications in photocataly- sis, for splitting of water5­13 and are essential to promote adsorption and reaction of gas molecules.14 As O atoms desorb from the sur- face of Ti

Ciobanu, Cristian

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Mesoporous Nanostructured Nb-Doped Titanium Dioxide Microsphere Catalyst Supports for PEM Fuel Cell Electrodes  

Science Journals Connector (OSTI)

Mesoporous Nanostructured Nb-Doped Titanium Dioxide Microsphere Catalyst Supports for PEM Fuel Cell Electrodes ... The material has been investigated as cathode electrocatalyst support for polymer electrolyte membrane (PEM) fuel cells. ... doped titania; PEMFC; electrocatalyst; mesoporous materials; microspheres ...

Laure Chevallier; Alexander Bauer; Sara Cavaliere; Rob Hui; Jacques Rozière; Deborah J. Jones

2012-03-19T23:59:59.000Z

42

VOLUME 81, NUMBER 14 P H Y S I C A L R E V I E W L E T T E R S 5 OCTOBER 1998 Structure and Energetics of Water Adsorbed at TiO2 Anatase 101 and 001 Surfaces  

E-Print Network [OSTI]

of TiO2 rutile, that is, in turn, the most stable polymorph of titanium dioxide. However, it is anatase, nondissociative molecular adsorption at fivefold coordinated Ti sites is favored at both low and monolayer coverage. On the (001) surface, for u # 0.5, H2O is adsorbed dissociatively, with an adsorption energy DHH

Selloni, Annabella

43

Catalyst characterisation of Fe-doped-titanium dioxide  

Science Journals Connector (OSTI)

Fe (5 wt. %) doped TiO2 was synthesised using a hydrothermal method. This material was characterised by X-Ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM) imaging, BET surface area, X-Ray photoelectron spectroscopy (XPS) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). The BET surface area was 136 m²/g and crystal sizes of 1.6 microns. SEM results showed crystal structures that were regular and pyramidal in shape. This catalyst only showed anatase phase. This favoured phase could be due to iron ions inserted into the TiO2 lattice and forming Ti-O-Fe bonds. It was found that doping TiO2 with 5 wt. % Fe caused a red shift in the absorption of the material to the visible light range and there was an increased absorption in the ultraviolet-visible diffuse reflectance spectroscopy, in the 450-590 nm range. These characteristics are very favourable for the use of 'free' visible light in order to activate the Fe (5 wt. %) doped TiO2 photocatalyst. [Received: September 4, 2009; Accepted: November 30, 2009

Maria D. Salazar-Villalpando; Anthony Cugini; Adam C. Miller

2010-01-01T23:59:59.000Z

44

Improved tribo-mechanical behavior of CaP-containing TiO2 layers produced on titanium by shot blasting and micro-arc oxidation  

Science Journals Connector (OSTI)

The combination of shot blasting (SB) and micro-arc oxidation (or anodic oxidation—AO) in titanium surfaces was shown to...2 layers were produced on AO and SB + AO. The latter presented small pore size and inhomo...

Eduardo M. Szesz; Gelson B. de Souza…

2014-10-01T23:59:59.000Z

45

INDUSTRIAL EFFLUENT TREATMENT USING IONIZING RADIATION COMBINED TO TITANIUM DIOXIDE  

SciTech Connect (OSTI)

The Advanced Oxidation Process (AOP) with OH radicals are the most efficient to mineralize organic compounds, and there are various methods to generate OH radicals as the use of ozone, hydrogen peroxide and ultra-violet radiation and ionizing radiation. The irradiation of aqueous solutions with high-energy electrons results in the excitation and ionizing of the molecules and rapid (10{sup -14} - 10{sup -9} s) formation of reactive intermediates. These reactive species will react with organic compounds present in industrial effluent inducing their decomposition. Titanium dioxide (TiO{sub 2}) catalyzed photoreaction is used to remove a wide range of pollutants in air and water media, combined to UV/VIS light, FeO{sub 2}, and H{sub 2}O{sub 2}, but as far as known there is no report on the combination with ionizing radiation. In some recent studies, the removal of organic pollutants in industrial effluent, such as Benzene, Toluene, and Xylene from petroleum production using ionizing radiation was investigated. It has been ob served that none of the methods can be used individually in wastewater treatment applications with good economics and high degree of energy efficiency. In the present work, the efficiency of ionizing radiation in presence of TiO{sub 2} to treat industrial effluent was evaluated. The main aim to combine these technologies is to improve the efficiency for very hard effluents and to reduce the processing cost for future implementation to large-scale design.

Duarte, C.L.; Oikawa, H.; Mori, M.N.; Sampa, M.H.O.

2004-10-04T23:59:59.000Z

46

Growing TiO2 nanowires on the surface of graphene sheets in supercritical CO2: characterization and photoefficiency  

Science Journals Connector (OSTI)

Tremendous interest exists towards synthesizing nanoassemblies for dye-sensitized solar cells (DSSCs) using earth-abundant and -friendly materials with green synthetic approaches. In this work, high surface area TiO2 nanowire arrays were grown on the surface of functionalized graphene sheets (FGSs) containing ?COOH functionalities acting as a template by using a sol–gel method in the green solvent, supercritical carbon dioxide (scCO2). The effect of scCO2 pressure (1500, 3000 and 5000 psi), temperature (40, 60 and 80?°C), acetic acid/titanium isopropoxide monomer ratios (HAc/TIP = 2, 4 and 6), functionalized graphene sheets (FGSs)/TIP weight ratios (1:20, 1:40 and 1:60 w/w) and solvents (EtOH, hexane) were investigated. Increasing the HAc/TIPweight ratio from 4 to 6 in scCO2 resulted in increasing the TiO2 nanowire diameter from 10 to 40 nm. Raman and high resolution XPS showed the interaction of TiO2 with the ?COOH groups on the surface of the graphene sheets, indicating that graphene acted as a template for polycondensation growth. UV–vis diffuse reflectance and photoluminescence spectroscopy showed a reduction in titania's bandgap and also a significant reduction in electron–hole recombination compared to bare TiO2 nanowires. Photocurrent measurements showed that the TiO2nanowire/graphene composites prepared in scCO2 gave a 5? enhancement in photoefficiency compared to bare TiO2 nanowires.

Nasrin Farhangi; Yaocihuatl Medina-Gonzalez; Rajib Roy Chowdhury; Paul A Charpentier

2012-01-01T23:59:59.000Z

47

TITANIUM AND TITANIUM DIOXIDE1 (Data in metric tons, unless otherwise noted)  

E-Print Network [OSTI]

Stockpile Center continued to solicit offers for the sale of titanium sponge held in the Government-grade sponge. For fiscal year 2001, 4,540 tons of titanium sponge is being offered for sale. Stockpile Status for disposal FY 2000 FY 2000 Titanium sponge 19,100 3,390 19,100 4,540 4,240 Ev

48

Notes on the photo-induced characteristics of transition metal-doped and undoped titanium dioxide thin films  

E-Print Network [OSTI]

­gel method using titanium n-butoxide, acetylacetone, and transition metal acetylacetonates as precursors dioxide with transition met- als such as iron [28], cobalt [29], nickel [30], manganese [31], chro- mium

Cirkva, Vladimir

49

Appreciating the Role of Thermodynamics in LCA Improvement Analysis via an Application to Titanium Dioxide Nanoparticles  

Science Journals Connector (OSTI)

Appreciating the Role of Thermodynamics in LCA Improvement Analysis via an Application to Titanium Dioxide Nanoparticles ... Most available improvement approaches are highly subjective, and traditional LCA methods often do not account for resources other than fossil fuels. ... Current research policy and strategy documents recommend applying life cycle assessment (LCA) early in research and development (R&D) to guide emerging technologies toward decreased environmental burden. ...

Geoffrey F. Grubb; Bhavik R. Bakshi

2011-03-01T23:59:59.000Z

50

Deposition of TiO2 thin films by atmospheric plasma post-discharge assisted injection MOCVD  

E-Print Network [OSTI]

Deposition of TiO2 thin films by atmospheric plasma post-discharge assisted injection MOCVD C Keywords : Injection MOCVD, Atmospheric Plasma, titanium oxide, anatase, PECVD Abstract TiO2 thin films combines remote Atmospheric Pressure (AP) Plasma with Pulsed Injection Metallorganic Chemical Vapour

Boyer, Edmond

51

Calculation of optical and electronic properties of modeled titanium dioxide films of different densities  

Science Journals Connector (OSTI)

The electronic and optical properties of TiO2 atomic structures representing simulated thin films have been investigated using density functional theory. Suitable model...

Turowski, Marcus; Amotchkina, Tatiana; Ehlers, Henrik; Jupé, Marco; Ristau, Detlev

2014-01-01T23:59:59.000Z

52

Preparation of narrow band gap V2O5/TiO2 composite films by micro-arc oxidation  

Science Journals Connector (OSTI)

V2O5/TiO2...composite films were prepared on pure titanium substrates via micro-arc oxidation (MAO) in electrolytes consisting of NaVO3. Their morphology and elements were characterized by scanning electron micro...

Qiang Luo; Xin-wei Li; Qi-zhou Cai…

2012-11-01T23:59:59.000Z

53

Titanium dioxide nanofiber-cotton targets for efficient multi-keV x-ray generation  

SciTech Connect (OSTI)

Multi-keV x-ray generation from low-density (27{+-}7 mg/cm{sup 3}) nanofiber-cotton targets composed of titanium dioxide has been investigated. The cotton targets were heated volumetrically and supersonically to a peak electron temperature of 2.3 keV, which is optimal to yield Ti K-shell x rays. Considerable enhancement of conversion efficiency [(3.7{+-}0.5)%] from incident laser energy into Ti K-shell x rays (4-6 keV band) was attained in comparison with that [(1.4{+-}0.9)%] for a planar Ti-foil target.

Tanabe, Minoru; Nishimura, Hiroaki; Fujioka, Shinsuke; Nagai, Keiji; Yamamoto, Norimasa; Mima, Kunioki [Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871 (Japan); Gu, Zhong-Ze; Pan, Chao [State Key Laboratory of Bioelectronics, Southeast University, Nanjing, Jiangsu 210096 (China); Girard, Frederic; Primout, Michel; Villette, Bruno; Brebion, Didier [Commissariat a l'Energie Atomique, DAM-Ile-de-France, Bruyeres-le-Chatel, 91297 Arpajon, Cedex (France); Fournier, Kevin B. [Lawrence Livermore National Laboratory, P.O. Box 808, L-473, Livermore, California 94550 (United States); Fujishima, Akira [Kanagawa Academy of Science and Technology, 3-2-1 Sakato, Takatsu-ku, Kawasaki 213-0012 (Japan)

2008-08-04T23:59:59.000Z

54

Energetics of the Nanocrystalline Titanium Dioxide/Aqueous Solution Interface: Approximate Conduction Band Edge Variations between H0 ) -10 and H-) +26  

E-Print Network [OSTI]

Energetics of the Nanocrystalline Titanium Dioxide/Aqueous Solution Interface: Approximate). Here we report on the dependence of the conduction band edge energy of nanocrystalline titanium dioxide the reversible uptake of protons at near band edge trap sites,6 even under conditions where surface adsorption

55

Using ethanol for preparation of nanosized TiO2 by gaseous detonation  

Science Journals Connector (OSTI)

A method of preparing nanosized titanium dioxide by gaseous detonation by using ethanol, hydrogen, and oxygen as an explosion...

H. H. Yan; X. C. Huang; S. X. Xi

2014-03-01T23:59:59.000Z

56

Photo-, Bio-, and Magneto-active Colored Polyester Fabric with Hydrophobic/Hydrophilic and Enhanced Mechanical Properties through Synthesis of TiO2/Fe3O4/Ag Nanocomposite  

Science Journals Connector (OSTI)

(9-12) Reducing the photo yellowing of wool, obtaining self-cleaning wool fabrics, nano-photo-scouring, and nano-photobleaching of cotton and wool fabrics, enhancing nano-TiO2 adsorption on the blend of wool/polyester by biofinishing and producing polyester fabrics with simultaneous self-cleaning, antimicrobial, and UV protection properties, free carrier dyeing of nano-TiO2 treated polyester fabric, mothproofing of wool fabric by treatment with nano-TiO2 and sono-synthesis of TiO2 nanoparticles on cotton fabric producing self-cleaning and UV protection properties are some of the major applications of nano-TiO2 particles in textiles. ... (20, 21) The photoinduced silver on nano-titanium dioxide was reported as an enhanced antimicrobial agent for wool fabric. ... Montazer, M.; Morshedi, S.Nano Photo Scouring and Nano Photo Bleaching of Raw Cellulosic Fabric Using Nano TiO2 Int. ...

Tina Harifi; Majid Montazer

2013-12-30T23:59:59.000Z

57

Modeling Excited States in TiO2 Nanoparticles: On the Accuracy of a TD-DFT Based Description  

SciTech Connect (OSTI)

We have investigated the suitability of Time-Dependent Density Functional Theory (TD-DFT) to describe vertical low-energy excitations in naked and hydrated titanium dioxide nanoparticles through a comparison with results from Equation-of-Motion Coupled Cluster (EOM-CC) quantum chemistry methods. We demonstrate that for most TiO2 nanoparticles TD-DFT calculations with commonly used exchange-correlation (XC-)potentials (e.g. B3LYP) and EOM-CC methods give qualitatively similar results. Importantly, however, we also show that for an important subset of structures, TD-DFT gives qualitatively different results depending upon the XC-potential used and that in this case only TD-CAM-B3LYP and TD-BHLYP calculations yield results that are consistent with those obtained using EOM-CC theory. Moreover, we demonstrate that the discrepancies for such structures arise from a particular combination of defects, excitations involving which are charge-transfer excitations and hence are poorly described by XC-potentials that contain no or low fractions of Hartree-Fock like exchange. Finally, we discuss that such defects are readily healed in the presence of ubiquitously present water and that as a result the description of vertical low-energy excitations for hydrated TiO2 nanoparticles is hence non-problematic.

Berardo, Enrico; Hu, Hanshi; Shevlin, S. A.; Woodley, Scott M.; Kowalski, Karol; Zwijnenburg, Martijn A.

2014-03-11T23:59:59.000Z

58

Induction of Cytotoxicity by Photoexcited TiO2 Particles  

Science Journals Connector (OSTI)

...TiO2 in the suspension was measured with combustion analysis. The TiO2 aqueous suspension...photoexcited TiO2 particles. it did not produce heat at the irradiated site. Since TiO2 alone...Heterogeneous photocatalytic oxidation of hydrocarbons on platinized TiO2 powders. J. Phys...

Ruxiong Cai; Yoshinobu Kubota; Taro Shuin; Hideki Sakai; Kazuhito Hashimoto; and Akira Fujishima

1992-04-15T23:59:59.000Z

59

Carbon monoxide annealed TiO2 nanotube array electrodes for efficient biosensor applications  

E-Print Network [OSTI]

Carbon monoxide annealed TiO2 nanotube array electrodes for efficient biosensor applications by anodic oxidation of titanium foil followed with O2 and CO annealing were employed as matrices consisted of Ti3+ defects with carbon-doping and exhibited well defined quasi-reversible cyclic voltammetric

Cao, Guozhong

60

Biosynthesis of titanium dioxide nanoparticles using a probiotic from coal fly ash effluent  

SciTech Connect (OSTI)

Graphical abstract: - Highlights: • Metal resistant probiotic species was isolated from coal fly ash effluent site. • Uniform sized anatase form of TiO{sub 2} nanoparticles were synthesized using Propionibacterium jensenii. • Diffraction patterns confirmed the anatase – TiO{sub 2} NPs with average size <80 nm. • TiO{sub 2} nanoparticle incorporated wound dressing exhibits better wound healing. - Abstract: The synthesis of titanium dioxide nanoparticle (TiO{sub 2} NP) has gained importance in the recent years owing to its wide range of potential biological applications. The present study demonstrates the synthesis of TiO{sub 2} NPs by a metal resistant bacterium isolated from the coal fly ash effluent. This bacterial strain was identified on the basis of morphology and 16s rDNA gene sequence [KC545833]. The physico-chemical characterization of the synthesized nanoparticles is completely elucidated by energy dispersive X-ray analysis (EDAX), Fourier transform infrared spectroscopy (FTIR) and transmission and scanning electron microscopy (TEM, SEM). The crystalline nature of the nanoparticles was confirmed by X-RD pattern. Further, cell viability and haemolytic assays confirmed the biocompatible and non toxic nature of the NPs. The TiO{sub 2} NPs was found to enhance the collagen stabilization and thereby enabling the preparation of collagen based biological wound dressing. The paper essentially provides scope for an easy bioprocess for the synthesis of TiO{sub 2} NPs from the metal oxide enriched effluent sample for future biological applications.

Babitha, S; Korrapati, Purna Sai, E-mail: purnasaik.clri@gmail.com

2013-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

E-Print Network 3.0 - arterial carbon dioxide Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

reactivity. inserm-00495071... , manufactured nanoparticles, especially carbon or titanium dioxide nanoparticles, could be relevant surrogate... of carbon or titanium dioxide...

62

Titanium-Dioxide Nano-Fiber-Cotton Targets for Efficient Multi-keV X-Ray Generation  

SciTech Connect (OSTI)

Multi-keV x-ray generation from low-density (27 {+-} 7 mg/cc) nano-fiber-cotton targets composed of titanium-dioxide has been investigated. The cotton targets were heated volumetrically and supersonically to a peak electron temperature of 2.3 keV, which is optimal to yield Ti K-shell x rays. Considerable enhancement of conversion efficiency (3.7 {+-} 0.5%) from incident laser energy into Ti K-shell x rays (4-6 keV band) was attained in comparison with that (1.4 {+-} 0.9%) for a planar Ti-foil target.

Tanabe, M; Nishimura, H; Fujioka, S; Nagai, K; Yamamoto, N; Gu, Z; Pan, C; Girard, F; Primout, M; Villette, B; Brebion, D; Fournier, K B; Fujishima, A; Mima, K

2008-06-12T23:59:59.000Z

63

Process for synthesizing titanium carbide, titanium nitride and titanium carbonitride  

DOE Patents [OSTI]

A process for synthesizing titanium carbide, titanium nitride or titanium carbonitride. The process comprises placing particles of titanium, a titanium salt or titanium dioxide within a vessel and providing a carbon-containing atmosphere within the vessel. The vessel is heated to a pyrolysis temperature sufficient to pyrolyze the carbon to thereby coat the particles with a carbon coating. Thereafter, the carbon-coated particles are heated in an inert atmosphere to produce titanium carbide, or in a nitrogen atmosphere to produce titanium nitride or titanium carbonitride, with the heating being of a temperature and time sufficient to produce a substantially complete solid solution.

Koc, Rasit (Lakewood, CO); Glatzmaier, Gregory C. (Boulder, CO)

1995-01-01T23:59:59.000Z

64

Process for synthesizing titanium carbide, titanium nitride and titanium carbonitride  

DOE Patents [OSTI]

A process is disclosed for synthesizing titanium carbide, titanium nitride or titanium carbonitride. The process comprises placing particles of titanium, a titanium salt or titanium dioxide within a vessel and providing a carbon-containing atmosphere within the vessel. The vessel is heated to a pyrolysis temperature sufficient to pyrolyze the carbon to thereby coat the particles with a carbon coating. Thereafter, the carbon-coated particles are heated in an inert atmosphere to produce titanium carbide, or in a nitrogen atmosphere to produce titanium nitride or titanium carbonitride, with the heating being of a temperature and time sufficient to produce a substantially complete solid solution.

Koc, R.; Glatzmaier, G.C.

1995-05-23T23:59:59.000Z

65

Photo induced silver on nano titanium dioxide as an enhanced antimicrobial agent for wool  

Science Journals Connector (OSTI)

In this study an effective nanocomposite antimicrobial agent for wool fabric was introduced. The silver loaded nano TiO2 as a nanocomposite was prepared through UV irradiation in an ultrasonic bath. The nanocomposite was stabilized on the wool fabric surface by using citric acid as a friendly cross-linking agent. The treated wool fabrics indicated an antimicrobial activity against both Staphylococcus aureus and Escherichia coli bacteria. Increasing the concentration of Ag/TiO2 nanocomposite led to an improvement in antibacterial activities of the treated fabrics. Also increasing the amount of citric acid improved the adsorption of Ag/TiO2 on the wool fabric surface leading to enhance antibacterial activity. The EDS spectrum, SEM images, and XRD patterns was studied to confirm the presence of existence of nanocomposite on the fabric surface. The role of both cross-linking agent and nanocomposite concentrations on the results was investigated using response surface methodology (RSM).

Majid Montazer; Amir Behzadnia; Esfandiar Pakdel; Mohammad Karim Rahimi; Mohammad Bameni Moghadam

2011-01-01T23:59:59.000Z

66

Titanium Dioxide Nanoparticles Induce DNA Damage and Genetic Instability In vivo in Mice  

Science Journals Connector (OSTI)

...Mice were housed in a 12-h light/dark cycle. Pregnancy was timed by checking for...0.05, respectively; Fig. 6A ). A general upregulation of these cytokines may be...rat lung following chronic inhalation of diesel emissions, carbon black and titanium...

Benedicte Trouiller; Ramune Reliene; Aya Westbrook; Parrisa Solaimani; and Robert H. Schiestl

2009-11-15T23:59:59.000Z

67

Effect of crystal phases of titanium dioxide on adsorption performance of H2TiO3-lithium adsorbent  

Science Journals Connector (OSTI)

Abstract Different crystal phases of TiO2 were produced by calcinations of metatitanic acid at various temperatures. H2TiO3-lithium adsorbent was obtained from the acid-modified adsorbent precursor Li2TiO3 which was synthesized by a solid-phase reaction between TiO2 and LiOH·H2O. Effects of crystal phases of TiO2 on the pull-out rate of Li+ from Li2TiO3 and adsorption properties of lithium adsorbent were studied. The results indicate that anatase structure rather than rutile reacted with LiOH·H2O aids the extraction of Li+ and the adsorption performance of lithium adsorbent. The maximum Li+ drawn out ratio from Li2TiO3 reaches 98.69%, and the maximum saturated adsorptive capacity comes up to 39.2 mg g?1.

Liyuan Zhang; Dali Zhou; Gang He; Fanhou Wang; Jiabei Zhou

2014-01-01T23:59:59.000Z

68

A novel "gelsol" strategy to synthesize TiO2 nanorod combining reduced graphene oxide composites  

E-Print Network [OSTI]

Graphene oxide Titanium dioxide Nanostructure Semiconductors Nanorods a b s t r a c t In this studyH value benefits the deprotonation of TEOA for adsorption to the stationary nuclei. Therefore triethanolamine (TEOA) with titanium (IV) isopropoxide (TIPO) at a molar ratio of [TEOA]:[TIPO]¼2:1, was added

Guo, John Zhanhu

69

Surface Science Letters Nature of the excited states of the rutile TiO2(110) surface  

E-Print Network [OSTI]

The nature of the electronically excited states on titanium dioxide surface is important for under- standing to the band gap in titanium dioxide that slows down recombina- tion of the electron­hole pair produced upon with adsorbed water molecule. The calculated adsorption energies and geometries are compared with available

Truong, Thanh N.

70

Molecular Hydrogen Formation from Proximal Glycol Pairs on TiO2...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hydrogen Formation from Proximal Glycol Pairs on TiO2(110). Molecular Hydrogen Formation from Proximal Glycol Pairs on TiO2(110). Abstract: Understanding hydrogen formation on TiO2...

71

A study of the physical, chemical and biological properties of TiO2 coatings produced by micro-arc oxidation in a Ca–P-based electrolyte  

Science Journals Connector (OSTI)

In this work, a porous and homogeneous titanium dioxide layer was grown on commercially pure titanium substrate using a micro-arc oxidation (MAO) process and Ca–P-based...2 coatings were characterized by X-ray di...

Amanda dos Santos; Joyce R. Araujo…

2014-07-01T23:59:59.000Z

72

Superhydrophilic TiO2 surface without photocatalytic activation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Superhydrophilic TiO2 surface without photocatalytic activation Superhydrophilic TiO2 surface without photocatalytic activation Title Superhydrophilic TiO2 surface without photocatalytic activation Publication Type Journal Article Year of Publication 2010 Authors Zormpa, Vasileia, Xiaobo Chen, and Samuel S. Mao Journal Applied Physics Letter Volume 96 Issue 9 Date Published 12/2009 Abstract Since the discovery of extreme surface wetting phenomenon induced by ultraviolet photocatalysis, TiO2 has become the material of choice for environmental friendly applications such as self-cleaning coatings. Nevertheless, it remains a significant challenge to realize surfaces exhibiting persistent superhydrophilicity but without the need of external stimuli. We report a bioinspired TiO2 nanostructure that shows extreme superhydrophilicity without the need of light activation, and with stability against successive wetting-dewetting cycles. This ultimate TiO2 wetting surface exhibits high transmittance from near ultraviolet to the infrared, thus enabling practical antifogging technologies where transparency is critical.

73

A novel approach for enhanced visible light activity in doped nanosize titanium dioxide through the excitons trapping  

SciTech Connect (OSTI)

Titanium dioxide doped with iron oxide (0-10 mol%) has been synthesized by an aqueous sol-gel method. The extent of phase transformation is higher in presence of up to 1 mol% of Fe{sup 3+} ions in doped titania. A further increase in Fe{sup 3+} content was found to decrease the phase transformation. A composition which contains {approx}90% rutile and the remaining anatase phase shows the highest photocatalytic activity. Even though surface area values are dramatically decreased by the modification of TiO{sub 2} by Fe{sup 3+} doping, crystallinity plays a major role in photocatalytic activity enhancement. UV-vis reflectance spectra indicate a red-shift in band gap energy and thus an enhanced photoactivity in visible light, suitable for application in photodegradation of toxic industrial effluents as well as other organic contaminants, is achieved. Low concentrations of Fe{sup 3+} ions act as excitons trapping centers, while higher concentrations act as recombination centers. The synergy between the rutile-anatase ratios and optimum amount of Fe{sup 3+} ions improve the interfacial charge transfer and trapping which enhanced the photochemical degradation of MB dye. The Fe{sup 3+} doped TiO{sub 2} composition has the highest photoactivity, having an apparent rate constant of 11.1 Multiplication-Sign 10{sup -3} min{sup -1}, which is much higher than that of commercial P25 Degussa titania (6.03 Multiplication-Sign 10{sup -3} min{sup -1}). - Graphical abstract: Model explaining the transfer and trapping of e{sup -}/h{sup +} pairs in mixed phase titania by Fe{sup 3+} ions suggests the reason for the increased lifetime of e{sup -}/h{sup +} pairs and enhanced photocatalytic activity. Highlights: Black-Right-Pointing-Pointer An aqueous sol-gel method for the preparation of doped TiO{sub 2} is being reported. Black-Right-Pointing-Pointer High photocatalytic activity and simplicity are the novelty of this work. Black-Right-Pointing-Pointer Enhanced activity is explained by the mechanism of trapping of charges.

Jaimy, Kanakkanmavudi B.; Baiju, K.V.; Ghosh, Swapankumar [National Institute for Interdisciplinary Science and Technology, CSIR, Trivandrum 695019 (India); Warrier, K.G.K., E-mail: wwarrierkgk@yahoo.co.in [National Institute for Interdisciplinary Science and Technology, CSIR, Trivandrum 695019 (India)

2012-02-15T23:59:59.000Z

74

Preparation of porous nitrogen-doped titanium dioxide microspheres and a study of their photocatalytic, antibacterial and electrochemical activities  

SciTech Connect (OSTI)

Graphical abstract: Porous N-doped TiO{sub 2} microspheres were prepared for the first time via plasma technique. The sample exhibited better photocatalytic activity, photoinduced inactivation activity and better electrochemical activity than those of TiO{sub 2} microspheres and P25. Display Omitted Highlights: ? Porous N-doped TiO{sub 2} microspheres were prepared via nitrogen plasma technique. ? Plasma treatment did not affect the porous structure of the TiO{sub 2} microspheres. ? With the plasma treatment, the N contents in the samples increased. ? Their photocatalytic, antibacterial and electrochemical activities were studied. -- Abstract: Nitrogen-doped titanium dioxide (N-doped TiO{sub 2}) microspheres with porous structure were prepared via the nitrogen-assisted glow discharge plasma technique at room temperature for the first time. The samples were characterized by X-ray diffraction, scanning electron microscopy, nitrogen adsorption–desorption measurement, UV–Vis diffuse reflectance spectra, photoluminescence spectroscopy and X-ray photoelectron spectroscopy. The results indicated that the plasma treatment did not affect the porous structure of the TiO{sub 2} microspheres. With the plasma treatment, the N contents in the samples increased. During the photocatalytic degradation of methylene blue under simulative sunlight irradiation, the sample after plasma treatment for 60 min (N-TiO{sub 2}-60) exhibited higher photocatalytic activity than those of the TiO{sub 2} microspheres, P25 and other N-doped TiO{sub 2} microspheres. Furthermore, the N-TiO{sub 2}-60 showed excellent antibacterial activities towards Escherichia coli under visible irradiation. These should be attributed to the enhancement of the visible light region absorption for TiO{sub 2} after N-doping. Electrochemical data demonstrated that the N-doping not only enhanced the electrochemical activity of TiO{sub 2}, but also improved the reversibility of Li insertion/extraction reactions and the rate behavior of TiO{sub 2} during charge–discharge cycles.

Chen, S. [College of Chemical Engineering, Sichuan University, Chengdu 610065 (China)] [College of Chemical Engineering, Sichuan University, Chengdu 610065 (China); Chu, W., E-mail: chuwei65@yahoo.com.cn [College of Chemical Engineering, Sichuan University, Chengdu 610065 (China); Huang, Y.Y. [College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059 (China)] [College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059 (China); Liu, X. [College of Chemical Engineering, Sichuan University, Chengdu 610065 (China)] [College of Chemical Engineering, Sichuan University, Chengdu 610065 (China); Tong, D.G., E-mail: tongdongge@163.com [College of Chemical Engineering, Sichuan University, Chengdu 610065 (China); College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059 (China)

2012-12-15T23:59:59.000Z

75

Decoding Titanium Dioxide | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

range from the production of clean hydrogen energy and self-cleaning auto windshields to purification of air and water. "The photocatalytic and thermo-catalytic chemistry of the...

76

Structure, defects, and impurities at the rutile TiO2(011)-(2 1) surface: A scanning tunneling microscopy study  

E-Print Network [OSTI]

Available online 21 July 2006 Abstract The titanium dioxide rutile (011) (equivalent to (101)) surface boundaries 1. Introduction Titanium dioxide is a versatile material that finds appli- cations in a wide range) structure are active adsorption sites. Segregation of calcium impurities from the bulk results in an ordered

Diebold, Ulrike

77

Self-assembled TiO2-Graphene Hybrid Nanostructures for Enhanced...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

TiO2-Graphene Hybrid Nanostructures for Enhanced Li-ion Insertion . Self-assembled TiO2-Graphene Hybrid Nanostructures for Enhanced Li-ion Insertion . Abstract: We used anionic...

78

Formaldehyde Polymerization on (WO3)3/TiO2(110) Model Catalyst...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Formaldehyde Polymerization on (WO3)3TiO2(110) Model Catalyst. Formaldehyde Polymerization on (WO3)3TiO2(110) Model Catalyst. Abstract: Polymerization of formaldehyde, H2CO, was...

79

Imaging Adsorbate O-H Bond Cleavage: Methanol on TiO2(110). ...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Adsorbate O-H Bond Cleavage: Methanol on TiO2(110). Imaging Adsorbate O-H Bond Cleavage: Methanol on TiO2(110). Abstract: We investigated methanol adsorption and dissociation on...

80

TiO2 Nanoparticles as a Soft X-ray Molecular Probe  

E-Print Network [OSTI]

Figure 1. TEM image of PAA coated TiO 2 nanoparticles .TOPO with polyacrylic acid (PAA) . Preparation of TiO 2 -TOPO with polyacrylic acid (PAA) 2 . A solution of 0.1 g PAA

Ashcroft, Jared M.

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Chemical Reactivity of Reduced TiO2(110): The dominant role of...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Reactivity of Reduced TiO2(110): The dominant role of surface defects in oxygen chemisorption. Chemical Reactivity of Reduced TiO2(110): The dominant role of surface defects in...

82

Acetone Chemistry on Oxidized and Reduced TiO2(110). | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Acetone Chemistry on Oxidized and Reduced TiO2(110). Acetone Chemistry on Oxidized and Reduced TiO2(110). Abstract: The chemistry of acetone on the oxidized and reduced surfaces of...

83

Methylene Bromide Chemistry and Photochemistry on Rutile TiO2...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Methylene Bromide Chemistry and Photochemistry on Rutile TiO2(110). Methylene Bromide Chemistry and Photochemistry on Rutile TiO2(110). Abstract: The chemistry and photochemistry...

84

Alcohol Chemistry on Rutile TiO2(110): The Influence of Alkyl...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Alcohol Chemistry on Rutile TiO2(110): The Influence of Alkyl Substituents on Reactivity and Selectivity. Alcohol Chemistry on Rutile TiO2(110): The Influence of Alkyl Substituents...

85

Surface Chemistry of 2-Propanol on TiO2(110): Low and High Temperature...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Chemistry of 2-Propanol on TiO2(110): Low and High Temperature Dehydration, Isotope Effects, and Influence of Local Surface Chemistry of 2-Propanol on TiO2(110): Low and High...

86

Hierarchically structured TIO2 nanorod spheres for clean water and energy production.  

E-Print Network [OSTI]

??This study focuses on the synthesis of hierarchical TiO2 nanorod spheres for photocatalytic clean water and energy production. TiO2 nanorod spheres were firstly synthesized by… (more)

Bai, Hongwei

2014-01-01T23:59:59.000Z

87

Optical and electrical characterization of the electron beam gun evaporated TiO2 lm  

E-Print Network [OSTI]

Optical and electrical characterization of the electron beam gun evaporated TiO2 ®lm V of TiO2 ®lms obtained by electron beam gun evaporation and annealed in an oxygen environment. A negative with TiO2 insulator ®lms deposited by electron beam gun evaporator. P-type Si wafers (1 0 0 orientation

Eisenstein, Gadi

88

Structure and Dynamics of CO2 on Rutile TiO2(110)-1×1....  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

CO2 on Rutile TiO2(110)-1×1. Structure and Dynamics of CO2 on Rutile TiO2(110)-1×1. Abstract: Adsorption, binding, and diffusion of CO2 molecules on rutile TiO2(110)...

89

A UV light enhanced TiO2/graphene device for oxygen sensing at room temperature  

E-Print Network [OSTI]

A UV light enhanced TiO2/graphene device for oxygen sensing at room temperature Jia Zhang,ab Chao temperature oxygen sensor based on TiO2/graphene device was developed with an enhanced sensing performance­hole pairs in the TiO2 film and the photogenerated electrons were scavenged by graphene and percolated

Cao, Wenwu

90

Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles  

Science Journals Connector (OSTI)

Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles ... Comment on “Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles” ... Comment on “Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles” ...

Toshiyuki Abe; Eiji Suzuki; Kentaro Nagoshi; Kohichi Miyashita; Masao Kaneko:

2000-03-24T23:59:59.000Z

91

A novel hierarchical homogeneous nanoarchitecture of TiO2 nanosheets branched TiO2 nanosheet arrays for high efficiency dye-sensitized solar cells  

Science Journals Connector (OSTI)

Abstract We report a novel hierarchical homogeneous nanoarchitecture of TiO2 nanosheets branched TiO2 nanosheet arrays, which is formed directly on transparent conductive fluorine-doped tin oxide (FTO) glass substrate through a one-step facile hydrothermal reaction without the use of a seed layer. The hierarchical homogeneous nanoarchitecture is composed of long TiO2 nanosheet trunks grafted with a large number of TiO2 nanosheet branches, which is an effective structure to improve the charge transport with the increase of the specific surface area. Dye-sensitized solar cell (DSSC) based on TiO2 nanosheets branched TiO2 nanosheet arrays can achieve an outstanding power conversion efficiency of 6.66%, which is attributed to the specific performances such as higher specific surface area for adsorbing more dye molecules, superior light scattering capacity for boosting the light-harvesting efficiency and faster charge transport for efficient charge collection.

Bing-Xin Lei; Xiao-Feng Zheng; He-kang Qiao; Yi Li; Shu-Nuo Wang; Guo-Lei Huang; Zhen-Fan Sun

2014-01-01T23:59:59.000Z

92

Three Human Cell Types Respond to Multi-Walled Carbon Nanotubes and Titanium Dioxide Nanobelts with Cell-Specific Transcriptomic and Proteomic Expression Patterns.  

SciTech Connect (OSTI)

The growing use of engineered nanoparticles (NPs) in commercial and medical applications raises the urgent need for tools that can predict NP toxicity. Global transcriptome and proteome analyses were conducted on three human cell types, exposed to two high aspect ratio NP types, to identify patterns of expression that might indicate high versus low NP toxicity. Three cell types representing the most common routes of human exposure to NPs, including macrophage-like (THP-1), small airway epithelial and intestinal (Caco-2/HT29-MTX) cells, were exposed to TiO2 nanobelts (TiO2-NB; high toxicity) and multi-walled carbon nanotubes (MWCNT; low toxicity) at low (10 µg/mL) and high (100 µg/mL) concentrations for 1 and 24 h. Unique patterns of gene and protein expressions were identified for each cell type, with no differentially expressed (p < 0.05, 1.5-fold change) genes or proteins overlapping across all three cell types. While unique to each cell type, the early response was primarily independent of NP type, showing similar expression patterns in response to both TiO2-NB and MWCNT. The early response might, therefore, indicate a general response to insult. In contrast, the 24 h response was unique to each NP type. The most significantly (p < 0.05) enriched biological processes in THP-1 cells indicated TiO2-NB regulation of pathways associated with inflammation, apoptosis, cell cycle arrest, DNA replication stress and genomic instability, while MWCNT-regulated pathways indicated increased cell proliferation, DNA repair and anti-apoptosis. These two distinct sets of biological pathways might, therefore, underlie cellular responses to high and low NP toxicity, respectively.

Tilton, Susan C.; Karin, Norman J.; Tolic, Ana; Xie, Yumei; Lai, Xianyin; Hamilton, Raymond F.; Waters, Katrina M.; Holian, Andrij; Witzmann, Frank A.; Orr, Galya

2014-08-01T23:59:59.000Z

93

The 2 1 reconstruction of the rutile TiO2(011) surface: A combined density functional theory, X-ray diffraction, and scanning  

E-Print Network [OSTI]

for publication 28 October 2008 Available online 5 November 2008 Keywords: Titanium dioxide Surface reconstruction exhibits two different types of undercoordinated oxygen and titanium atoms, and is, in its stoichiometric form, predicted to be rather inert towards the adsorption of probe molecules. Ã? 2008 Elsevier B.V. All

Diebold, Ulrike

94

Photoelectrochemical Water Splitting of Nitrogen and Hydrogen Treated P25 TiO2 Films  

E-Print Network [OSTI]

CdS and CdSe have been successfully employed in the sensitization of TiO 2 . Although sensitization and doping

Zavodivker, Liat Shari

2014-01-01T23:59:59.000Z

95

Preparation of Highly Transparent TiO2-based Thin Film Photocatalysts by an Ion Engineering Method: Ionized Cluster Beam Deposition  

Science Journals Connector (OSTI)

Highly transparent TiO2 and TiO2-based binary oxide (TiO2/SiO2 and TiO2/B2O3) thin films of different TiO2 contents were successfully prepared by using an ion engineering technique as a dry process. These transpa...

Masato Takeuchi; Masakazu Anpo

2010-01-01T23:59:59.000Z

96

Photocatalytic effects of wool fibers modified with solely TiO2 nanoparticles and N-doped TiO2 nanoparticles by using hydrothermal method  

Science Journals Connector (OSTI)

Abstract The surfaces of wool fibers are modified with N-doped TiO2 nanoparticles by treating the fibers with tetrabutyl titanate and ammonium chloride under low temperature hydrothermal conditions to obtain wool fibers with photocatalytic functions in the visible light spectrum. The effects of nitrogen and sulfur in amino acids in keratin on the photocatalytic activity of TiO2 particle coated wool fibers are investigated. Changes of various fiber properties such as tensile strength, photocatalytic activity, and self-cleaning performance of untreated, TiO2 coated and N-doped TiO2 coated wool fibers are studied. It is found that N-doped anatase TiO2 nanoparticles with an average grain size of 11.2 nm are synthesized and simultaneously grafted onto the wool fibers. After treatments, the crystallization index of the wool fibers is slightly reduced. The capability to protect against ultraviolet radiation is much enhanced. The performances of photocatalytic degradation of methylene blue dye and self-cleaning of red wine under both UV and visible light irradiation are endowed. It is also found that wool fibers coated with TiO2 particles without being doped by nitrogen still have apparent photocatalytic reactions and self-cleaning effects under visible light irradiation due to the formation of C-Ti3+, O-Ti3+, and N-Ti3+ bonds between TiO2 and wool keratin on the wool fiber surfaces. Thus wool fabrics might not need to be coated with N-doped TiO2 nanoparticles to realize its self-cleaning effect under visible light. Such important conclusions would provide wool materials with wide applications in clothing and technical products such as wastewater treatment.

Hui Zhang; Zhenwei Yang; Xingtao Zhang; Ningtao Mao

2014-01-01T23:59:59.000Z

97

Interaction of CO2 with Oxygen Adatoms on Rutile TiO2(110). ...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

CO2 with Oxygen Adatoms on Rutile TiO2(110). Interaction of CO2 with Oxygen Adatoms on Rutile TiO2(110). Abstract: The interactions of CO2 with oxygen adatoms (Oa’s) on...

98

Highly ordered TiO2 macropore arrays as transparent photocatalysts  

Science Journals Connector (OSTI)

Highly ordered transparent TiO2 macropore arrays were synthesized via a simple glass-clamping method at room temperature. The as-synthesized TiO2 macropore arrays show high transmittance in the visible light region and can be used ...

Yuan Dong; Junfeng Chao; Zhong Xie; Xin Xu; Zhuoran Wang; Di Chen

2012-01-01T23:59:59.000Z

99

Slow Neutron Scattering by the Titanium Isotopes  

Science Journals Connector (OSTI)

Neutron diffraction studies are reported on isotopically enriched samples of TiO2 from which are evaluated the coherent scattering amplitudes of the titanium isotopes. Scattering amplitudes of +0.48, +0.33, -0.58, +0.08, and +0.55×10-12 cm were established for the titanium isotopes of mass 46, 47, 48, 49, and 50, respectively. The major isotope Ti48 is thus responsible for the anomalous scattering amplitude, -0.34×10-12 cm, characteristic of the normal element. Pronounced nuclear scattering resonance effects on the observed neutron scattering are suggested to occur for most of the isotopes.

C. G. Shull; M. K. Wilkinson; M. H. Mueller

1960-05-01T23:59:59.000Z

100

Sealing glasses for titanium and titanium alloys  

DOE Patents [OSTI]

Barium lanthanoborate sealing-glass compositions are provided comprising various combinations (in terms of mole-%) of boron oxide (B.sub.2 O.sub.3), barium oxide (BaO), lanthanum oxide (La.sub.2 O.sub.3), and at least one other oxide selected from the group consisting of aluminum oxide (Al.sub.2 O.sub.3), calcium oxide (CaO), lithium oxide (Li.sub.2 O), sodium oxide (Na.sub.2 O), silicon dioxide (SiO.sub.2), or titanium dioxide (TiO.sub.2). These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys having an improved aqueous durability and favorable sealing characteristics. Examples of the sealing-glass compositions are provided having coefficients of thermal expansion about that of titanium or titanium alloys, and with sealing temperatures less than about 900.degree. C., and generally about 700.degree.-800.degree. C. The barium lanthanoborate sealing-glass compositions are useful for components and devices requiring prolonged exposure to moisture or water, and for implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps).

Brow, Richard K. (Albuquerque, NM); McCollister, Howard L. (Albuquerque, NM); Phifer, Carol C. (Albuquerque, NM); Day, Delbert E. (Rolla, MO)

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Sealing glasses for titanium and titanium alloys  

DOE Patents [OSTI]

Barium lanthanoborate sealing-glass compositions are provided comprising various combinations (in terms of mole-%) of boron oxide (B{sub 2}O{sub 3}), barium oxide (BaO), lanthanum oxide (La{sub 2}O{sub 3}), and at least one other oxide selected from the group consisting of aluminum oxide (Al{sub 2}O{sub 3}), calcium oxide (CaO), lithium oxide (Li{sub 2}O), sodium oxide (Na{sub 2}O), silicon dioxide (SiO{sub 2}), or titanium dioxide (TiO{sub 2}). These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys having an improved aqueous durability and favorable sealing characteristics. Examples of the sealing-glass compositions are provided having coefficients of thermal expansion about that of titanium or titanium alloys, and with sealing temperatures less than about 900 C, and generally about 700--800 C. The barium lanthanoborate sealing-glass compositions are useful for components and devices requiring prolonged exposure to moisture or water, and for implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps). 1 fig.

Brow, R.K.; McCollister, H.L.; Phifer, C.C.; Day, D.E.

1997-07-15T23:59:59.000Z

102

Breakdown Anodization (BDA) for hierarchical structures of titanium oxide  

E-Print Network [OSTI]

Breakdown Anodization (BDA) of titanium dioxide is a very promising, fast fabrication method to construct micro-scale and nano-scale structures on titanium surfaces. This method uses environmentally friendly electrolytes, ...

Choi, Soon Ju, S.M. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

103

Preparation of TiO2(110)-(1x1) Surface via UHV Cleavage: An scanning...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Preparation of TiO2(110)-(1x1) Surface via UHV Cleavage: An scanning tunneling microscopy study. Preparation of TiO2(110)-(1x1) Surface via UHV Cleavage: An scanning tunneling...

104

TiO2 nanoparticles on nitrogen-doped graphene as anode material for lithium ion batteries  

Science Journals Connector (OSTI)

Anatase TiO2...nanoparticles in situ grown on nitrogen-doped, reduced graphene oxide (rGO) have been successfully synthesized ... as an anode material for the lithium ion battery. The nanosized TiO2 particles wer...

Dan Li; Dongqi Shi; Zongwen Liu; Huakun Liu…

2013-04-01T23:59:59.000Z

105

Atomic Layer Deposition of TiO2 on Aerogel Templates: New Photoanodes for Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

Atomic layer deposition was employed to coat the aerogel template conformally with various thicknesses of TiO2 with subnanometer precision. ... The TiO2-coated aerogel membranes were incorporated as photoanodes in dye-sensitized solar cells. ...

Thomas W. Hamann; Alex B. F. Martinson; Jeffrey W. Elam; Michael J. Pellin; Joseph T. Hupp

2008-06-18T23:59:59.000Z

106

Titanium metal: extraction to application  

SciTech Connect (OSTI)

In 1998, approximately 57,000 tons of titanium metal was consumed in the form of mill products (1). Only about 5% of the 4 million tons of titanium minerals consumed each year is used to produce titanium metal, with the remainder primarily used to produce titanium dioxide pigment. Titanium metal production is primarily based on the direct chlorination of rutile to produce titanium tetrachloride, which is then reduced to metal using the Kroll magnesium reduction process. The use of titanium is tied to its high strength-to-weight ratio and corrosion resistance. Aerospace is the largest application for titanium. In this paper, we discuss all aspects of the titanium industry from ore deposits through extraction to present and future applications. The methods of both primary (mining of ore, extraction, and purification) and secondary (forming and machining) operations will be analyzed. The chemical and physical properties of titanium metal will be briefly examined. Present and future applications for titanium will be discussed. Finally, the economics of titanium metal production also are analyzed as well as the advantages and disadvantages of various alternative extraction methods.

Gambogi, Joseph (USGS, Reston, VA); Gerdemann, Stephen J.

2002-09-01T23:59:59.000Z

107

Tuning the Optical Properties of Mesoporous TiO2 Films by Nanoscale Engineering  

SciTech Connect (OSTI)

Introducing mesoscale pores into spincoated titanium dioxide films, prepared by spincoating different sol-gel precursor solutions on silicon substrates and subsequent annealing at 350 C, 400 C or 450 C, respectively, affects several optical properties of the material. The change in refractive index observed for different mesoporous anatase films directly correlates with changes in pore size, but is also in a more complex manner influenced by the film thickness and the density of pores within the films. Additionally, the band gap of the films is blueshifted by the stress the introduction of pores exerts on the inorganic matrix. The differently sized pores were templated by Pluronic{reg_sign} block copolymers in the solgel solutions and tuned by employing different annealing temperatures for the film preparation. This study focused on elucidating the effect different templating materials (F127 and P123) have on the pore size of the final mesoporous titania film, and on understanding the relation of varying polymer concentration (taking P123 as an example) in the sol-gel solution to the pore concentration and size in the resultant titania film. Titania thin film samples or corresponding titanium dioxide powders were characterized by X-ray diffraction, nitrogen adsorption, ellipsometery, UV/Vis spectrometry and other techniques to understand the interplay between mesoporosity and optical properties.

Schwenzer, Birgit; Wang, Liang; Swensen, James S.; Padmaperuma, Asanga B.; Silverman, Gary; Korotkov, Roman; Gaspar, Daniel J.

2012-07-03T23:59:59.000Z

108

CdS quantum dot sensitized nanocrystalline Gd-doped TiO2 thin films for photoelectrochemical solar cells  

Science Journals Connector (OSTI)

CdS quantum dot sensitized Gd-doped TiO2 nanocrystalline thin films have been prepared by chemical method. X-ray diffraction analysis reveals that TiO2 and Gd-doped TiO2...nanocrystalline thin films are of anatas...

A. Ranjitha; N. Muthukumarasamy…

2013-08-01T23:59:59.000Z

109

Preparation of Al2O3/TiO2-containing Coating on Aluminium Alloys by Micro-arc Oxidation  

Science Journals Connector (OSTI)

TiO2-containing ceramic coatings were deposited on the surface of aluminium alloys by micro-arc oxidition. Surface and cross-section topograph of ceramic coating were observed using scanning electron microscopy (SEM). The phase composition of ceramic ... Keywords: Micro-arc oxidation, TiO2 additive, Al2O3/TiO2 phase, antiwear behavior

Cheng Gao; Jinyong Xu; Yusheng Lan; Yonghui Ma; Weixiang Su; Yajuan Liu

2010-03-01T23:59:59.000Z

110

Synthesis and structure of Al clusters supported on TiO2,,110...: A scanning tunneling microscopy study  

E-Print Network [OSTI]

Synthesis and structure of Al clusters supported on TiO2,,110...: A scanning tunneling microscopy, Texas 77843-3255 Received 14 October 1997; accepted 6 April 1998 Al clusters supported on TiO2(110) have been investigated using scanning tunneling microscopy. Al interacts strongly with the TiO2(110) surface

Goodman, Wayne

111

A Study of Oxygen Vacancy Formation and Annihilation in Submonolayer Coverages of TiO2 Dispersed on MCM-48  

E-Print Network [OSTI]

A Study of Oxygen Vacancy Formation and Annihilation in Submonolayer Coverages of TiO2 Dispersed.932), suggesting the formation of oxygen vacancies. The fraction of Ti that could be reduced increased with TiO2 the TiO2 overlayer as the size of the titania patches increases. The amount of oxygen removed during

Bell, Alexis

112

Electron Source in Photoinduced Hydrogen Production on Pt-supported TiO2 Particles  

Science Journals Connector (OSTI)

Electron Source in Photoinduced Hydrogen Production on Pt-supported TiO2 Particles ... After recovering the TiO2/Pt particles used in the long-term reaction, they were reused in a photocatalytic H+ reduction by adding methanol as an electron donor, but no H2 production was observed showing that the TiO2/Pt particles have lost their photocatalytic activity after the long-term reaction. ... A 100 W high-pressure Hg lamp was used as a light source. ...

Toshiyuki Abe; Eiji Suzuki; Kentaro Nagoshi; Kohichi Miyashita; Masao Kaneko

1999-02-04T23:59:59.000Z

113

Synthesis and Analysis of TiO2-Oligonucleotide Hybrid Nanoparticles  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Synthesis and Analysis of TiO2-Oligonucleotide Hybrid Nanoparticles Synthesis and Analysis of TiO2-Oligonucleotide Hybrid Nanoparticles New developments in nanotechnology offer the creation of chemical-biological hybrid nanocomposites, which can be introduced into cells to initiate intracellular processes or biochemical reactions. Researchers from Northwestern University Medical Center (Chicago, IL) and Argonne National Laboratory synthesized TiO2-oligonucleotide nanocomposites made of DNA oligonucleotides attached to 45-Ã… TiO2 nanoparticles and tested them by using the 2-ID-E x-ray beamline at the X-ray Operations and Research sector 2 of the APS. A key benefit of nanocomposites is that they could advance medical biotechnology and open new doors in chemistry and materials sciences. Scan of a 21 x 21-m area with a single nucleus containing 3.6 x 106 nanoparticles.

114

Benefits and technological challenges in the implementation of TiO2-based  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Benefits and technological challenges in the implementation of TiO2-based Benefits and technological challenges in the implementation of TiO2-based ultraviolet photocatalytic oxidation (UVPCO) air cleaners Title Benefits and technological challenges in the implementation of TiO2-based ultraviolet photocatalytic oxidation (UVPCO) air cleaners Publication Type Conference Proceedings Year of Publication 2008 Authors Hodgson, Alfred T., Hugo Destaillats, Toshifumi Hotchi, and William J. Fisk Conference Name Indoor Air 2008 Pagination 17-22 Date Published August 2008 Publisher Indoor Air, Paper ID: 297 Conference Location Copenhagen, Denmark Abstract Indoor air cleaners based on TiO2 photocatalytic oxidation of organic pollutants are a promising technology to improve or maintain indoor air quality while reducing ventilation energy costs. We evaluated the performance of a pilot scale UVPCO air cleaner under realistic conditions in single pass and recirculation modes

115

Imaging Water Dissociation on TiO2(110): Evidence for Inequivalent...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

OH Groups. Abstract: Identical regions of partially reduced TiO2(110) surfaces with bridge-bonded oxygen vacancy (BBOV) concentrations of 10 % ML (1 ML 5.2×1014 cm-2)...

116

E-Print Network 3.0 - anatase tio2 nanoparticles Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Science 2 Influence of the synthesis conditions on the anatase-rutile phase transition of TiO2 Summary: Influence of the synthesis conditions on the anatase-rutile phase...

117

TiO2 Nanoparticles as a Soft X-ray Molecular Probe  

SciTech Connect (OSTI)

With the emergence of soft x-ray techniques for imaging cells, there is a pressing need to develop protein localization probes that can be unambiguously identified within the region of x-ray spectrum used for imaging. TiO2 nanocrystal colloids, which have a strong absorption cross-section within the "water-window" region of x-rays, areideally suited as soft x-ray microscopy probes. To demonstrate their efficacy, TiO2-streptavidin nanoconjugates were prepared and subsequently labeled microtubules polymerized from biotinylated tubulin. The microtubules were imaged using scanning transmission x-ray microscopy (STXM), and the TiO2 nanoparticle tags were specifically identified using x-ray absorption near edge spectroscopy (XANES). These experiments demonstrate that TiO2 nanoparticles are potential probes for protein localization analyses using soft x-ray microscopy.

Larabell, Carolyn; Ashcroft, Jared M.; Gu, Weiwei; Zhang, Tierui; Hughes, Steven M.; Hartman, Keith B.; Hofmann, Cristina; Kanaras, Antonios G.; Kilcoyne, David A.; Le Gros, Mark; Yin, Yadong; Alivisatos, A. Paul; Larabell, Carolyn A.

2007-06-30T23:59:59.000Z

118

Molecular Hydrogen Formation from Proximal Glycol Pairs on TiO2(110)  

SciTech Connect (OSTI)

Understanding hydrogen formation on TiO2 surfaces is of great importance as it could provide fundamental insight into water splitting for hydrogen production using solar energy. In this work, hydrogen formation from glycols having different numbers of methyl end-groups have been studied using temperature pro-grammed desorption on reduced, hydroxylated, and oxidized TiO2(110) surfaces. The results from OD-labeled glycols demon-strate that gas-phase molecular hydrogen originates exclusively from glycol hydroxyl groups. The yield is controlled by a combi-nation of glycol coverage, steric hindrance, TiO2(110) order and the amount of subsurface charge. Combined, these results show that proximal pairs of hydroxyl aligned glycol molecules and subsurface charge are required to maximize the yield of this redox reaction. These findings highlight the importance of geometric and electronic effects in hydrogen formation from adsorbates on TiO2(110).

Chen, Long; Li, Zhenjun; Smith, R. Scott; Kay, Bruce D.; Dohnalek, Zdenek

2014-04-16T23:59:59.000Z

119

Atomic Structure of the Anatase TiO2(001) Surface  

SciTech Connect (OSTI)

Understanding the structure of well-defined anatase TiO2 surfaces is critical for deciphering site-specific thermal and photo- reaction mechanisms on anatase TiO2. Using UHV scanning tunneling microscopy (STM), we have studied the atomic structure of anatase TiO2(001) epitaxial thin films grown by oxygen plasma assisted molecular beam epitaxy. Bright rows of the (1×4) reconstructed surface are resolved as three types of features with different sizes. High-resolution STM images taken from the same area at different bias voltages show that these individual features are originated from combinations of two basic atomic building blocks. We propose a modified added molecule model for the anatase TiO2 (001) surface structure.

Xia, Yaobiao; Zhu, Ke; Kaspar, Tiffany C.; Du, Yingge; Birmingham, Blake; Park, Kenneth T.; Zhang, Zhenrong

2013-08-16T23:59:59.000Z

120

Atomic Structure of the Anatase TiO2(001) Surface. | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

deciphering site-specific thermal and photo- reaction mechanisms on anatase TiO2. Using UHV scanning tunneling microscopy (STM), we have studied the atomic structure of anatase...

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Two Pathways for Water Interaction with Oxygen Adatoms on TiO2...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

tunneling microscopy and density functional theory studies show that oxygen adatoms (Oa), produced during O2 exposure of reduced TiO2(110) surfaces, alter the water dissociation...

122

TiO2/graphene nanocomposites as anode materials for high rate lithium-ion batteries  

Science Journals Connector (OSTI)

A simple strategy to prepare a hybrid of nanocomposites of anatase TiO2/graphene nanosheets (GNS) as anode materials for lithium-ion batteries was reported. The morphology and crystal structure...2/GNS electrode ...

Yi-ping Tang ???; Shi-ming Wang ???; Xiao-xu Tan ???…

2014-05-01T23:59:59.000Z

123

TiO2-based photocatalytic process for purification of polluted water: bridging fundamentals to applications  

Science Journals Connector (OSTI)

Recent years have witnessed a rapid accumulation of investigations on TiO2-based photocatalysis, which poses as a greatly promising advanced oxidation technology for water purification. As the ability of this advanced oxidation process is ...

Chuan Wang; Hong Liu; Yanzhen Qu

2013-01-01T23:59:59.000Z

124

The progress of TiO2 nanocrystals doped with rare earth ions  

Science Journals Connector (OSTI)

In the past decades, TiO2 nanocrystals (NCs) have been widely studied in the fields of photoelectric devices, optical communication, and environment for their stability in aqueous solution, being nontoxic, cheapness, and so on. Among the three ...

Hai Liu; Lixin Yu; Weifan Chen; Yingyi Li

2012-01-01T23:59:59.000Z

125

EPR Study of the Surface Characteristics of Nanostructured TiO2 under UV Irradiation  

E-Print Network [OSTI]

EPR Study of the Surface Characteristics of Nanostructured TiO2 under UV Irradiation Juan M of EPR spectroscopy. The samples of the H series present the smallest crystallite size and after

126

Enhanced Electrooxidation of Ethanol Using Pd/C + TiO2 Electrocatalysts in Alkaline Media  

Science Journals Connector (OSTI)

This work describes the use of Pd nanoparticles synthetized by the borohydride process and supported on physical mixtures of C + TiO2 toward the ethanol electrooxidation reaction in alkaline media. In this...2 ra...

J. C. M. Silva; G. S. Buzzo; R. F. B. De Souza; E. V. Spinacé…

2014-08-01T23:59:59.000Z

127

Photocatalytic performance of TiO2 thin films connected with Cu micro-grid  

Science Journals Connector (OSTI)

Aiming at reducing the recombination of photo-induced carriers in semiconductor photocatalytic process, we prepared TiO2...thin film with its surface modified by a connected Cu micro-grid via a microsphere lithog...

HaiLing Zhu; JunYing Zhang; TianMin Wang…

2009-08-01T23:59:59.000Z

128

Porous TiO2 microspheres with tunable properties for photocatalytic air purification Alberto Naldoni a,  

E-Print Network [OSTI]

, continuous operation, facile scale-up process from small to large production, and thorough control overPorous TiO2 microspheres with tunable properties for photocatalytic air purification Alberto

Suslick, Kenneth S.

129

Factors Affecting UV-Induced Superhydrophilic Conversion of a TiO2 Surface  

Science Journals Connector (OSTI)

Factors Affecting UV-Induced Superhydrophilic Conversion of a TiO2 Surface ... Particularly, the maximum extrema in spectral dependence of the efficiency of photoinduced hydrophilic conversion correspond to the energies of the first indirect and first direct electronic band-to-band transitions in TiO2. ... To estimate the efficiency of the photoinduced surface hydrophilic conversion, we used two parameters: initial rate of contact angle alteration and initial rate of surface energy alteration. ...

Alexei V. Emeline; Aida V. Rudakova; Munetoshi Sakai; Taketoshi Murakami; Akira Fujishima

2013-05-17T23:59:59.000Z

130

ELSEVIER Journal of ElectronSpectroscopyand Related Phenomena 73 (1995) 1-11 ELECTRON SPECTROSCOPY  

E-Print Network [OSTI]

1994;in finalform 9 August 1994 Abstract The adsorption of titanium on titanium dioxide TiO2(110) has SPECTROSCOPY andRelatedPhenomena Titanium and reduced titania overlayers on titanium dioxide(110) J.T. Mayer a spectroscopy I. Introduction Titanium dioxide has received extensive attention in the surface science community

Diebold, Ulrike

131

Tin oxide-titanium oxide/graphene composited as anode materials for lithium-ion batteries  

Science Journals Connector (OSTI)

A tin oxide-titanium oxide/graphene (SnO2-TiO2.../G) ternary nanocomposite as high-performance anode for Li-ion batteries was prepared via a simple reflux method. ... The graphite oxide (GO) was reduced to graphene

Shan-Shan Chen; Xue Qin

2014-10-01T23:59:59.000Z

132

Chemistry of NOx on TiO2 surfaces studied by ambient pressure XPS:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Chemistry of NOx on TiO2 surfaces studied by ambient pressure XPS: Chemistry of NOx on TiO2 surfaces studied by ambient pressure XPS: products, effect of UV irradiation, water and coadsorbed K+ Title Chemistry of NOx on TiO2 surfaces studied by ambient pressure XPS: products, effect of UV irradiation, water and coadsorbed K+ Publication Type Journal Article Year of Publication 2013 Authors Rosseler, Olivier, Mohamad Sleiman, Nahuel V. Montesinos, Andrey Shavorskiy, Valerie Keller, Nicolas Keller, Marta I. Litter, Hendrik Bluhm, Miquel Salmeron, and Hugo Destaillats Journal J. Phys. Chem. Lett. Volume 4 Start Page 536 Issue 3 Pagination 536-541 Date Published 01/2013 Abstract Self-cleaning surfaces containing TiO2 nanoparticles have been postulated to efficiently remove NOx from the atmosphere. However, UV irradiation of NOx adsorbed on TiO2 also was shown to form harmful gas-phase byproducts such as HONO and N2O that may limit their depolluting potential. Ambient pressure XPS was used to study surface and gas-phase species formed during adsorption of NO2 on TiO2 and subsequent UV irradiation at λ = 365 nm. It is shown here that NO3-, adsorbed on TiO2 as a byproduct of NO2 disproportionation, was quantitatively converted to surface NO2 and other reduced nitrogenated species under UV irradiation in the absence of moisture. When water vapor was present, a faster NO3- conversion occurred, leading to a net loss of surface-bound nitrogenated species. Strongly adsorbed NO3- in the vicinity of coadsorbed K+ cations was stable under UV light, leading to an efficient capture of nitrogenated compounds.

133

Cr, N-Codoped TiO2 Mesoporous Microspheres for Li-ion Rechargeable Batteries with Enhanced Electrochemical Performance  

SciTech Connect (OSTI)

Cr,N-codoped TiO2 mesoporous microspheres synthesized using hydrothermal and subsequent nitridation treatment, exhibited higher solubility of nitrogen, and improved electrical conductivity than N-doped TiO2, as anode for Lithium-ion rechargeable batteries, which led to improving charge-discharge capacity at 0.1 C and twice higher rate capability compared to that of nitrogen-doped TiO2 mesoporous microsphere at 10 C

Bi, Zhonghe [ORNL] [ORNL; Paranthaman, Mariappan Parans [ORNL] [ORNL; Guo, Bingkun [ORNL] [ORNL; Unocic, Raymond R [ORNL] [ORNL; Meyer III, Harry M [ORNL] [ORNL; Bridges, Craig A [ORNL] [ORNL; Sun, Xiao-Guang [ORNL] [ORNL; Dai, Sheng [ORNL] [ORNL

2014-01-01T23:59:59.000Z

134

Combined Investigation of Water Sorption on TiO2 Rutile (110) Single Crystal Face: XPS vs. Periodic DFT  

E-Print Network [OSTI]

1 Combined Investigation of Water Sorption on TiO2 Rutile (110) Single Crystal Face: XPS vs(0)169157150; e-mail: roques@ipno.in2p3.fr Keywords: water, sorption, rutile TiO2, (110), XPS, DFT. Abstract XPS and periodic DFT calculations have been used to investigate water sorption on the TiO2 rutile (110) face. Two

Paris-Sud XI, Université de

135

Preparation and properties of Al-PILC supported SO42?/TiO2 superacid catalyst  

Science Journals Connector (OSTI)

SO42?/TiO2/Al-pillared clay (ST/Al-PILC) superacid catalyst was prepared by loading active component SO42?/TiO2 on Al-pillared clay. The texture structure properties of the catalyst were studied by means of X-ray powder diffraction and the adsorption of N2. Acidity properties of the catalyst were tested by Hammett indicator method and FT-IR spectra of absorbed pyridine technique. The characterization results indicated that Al-PILC carrier could inhibit the formation of anatase TiO2 and the transformation of anatase TiO2 into rutile TiO2. ST/Al-PILC catalyst possesses both Lewis and Brönsted acid sites, and the number of acid sites on ST/Al-PILC is much larger than that on Al-PILC carrier, but its acid strength is lower than that of ST. Experimental results show that ST/Al-PILC is an effective catalyst for esterification of n-pentanol with benzoic acid.

Yue-Xiu Jiang; Xiao-Mei Chen; Yun-Fen Mo; Zhang-Fa Tong

2004-01-01T23:59:59.000Z

136

Predicting New TiO2 Phases with Low Band Gaps by a Multiobjective Global Optimization Approach  

E-Print Network [OSTI]

stable. This is equivalent to a global optimization problem of a biobjective function, i.e., total energyPredicting New TiO2 Phases with Low Band Gaps by a Multiobjective Global Optimization Approach Hou as a novel global optimization algorithm to predict new polymorphs of bulk TiO2 with better optical

Gong, Xingao

137

Improved Lithium Ion Behavior Properties of TiO2@Graphitic-like Carbon Core@Shell Nanostructure  

E-Print Network [OSTI]

Improved Lithium Ion Behavior Properties of TiO2@Graphitic-like Carbon Core@Shell Nanostructure Min Intercalation Electrochemistry Capacitance Lithium Ion batteries A B S T R A C T We demonstrate TiO2@graphitic on the electrode surface and enhanced lithium ion intercalation, leading to lower charge transfer resistance

Cao, Guozhong

138

Geometric and Electronic Properties of Sn-Doped TiO2 from First-Principles Calculations  

Science Journals Connector (OSTI)

Geometric and Electronic Properties of Sn-Doped TiO2 from First-Principles Calculations ... Finer k-point sets 3 × 3 × 4 and 3 × 5 × 4 were employed for calculating the electronic properties of doped rutile TiO2. ... This viewpoint is confirmed by the subsequent calculated formation energy. ...

Run Long; Ying Dai; Baibiao Huang

2008-12-17T23:59:59.000Z

139

Enhanced ethanol sensing properties of TiO2/ZnO core–shell nanorod sensors  

Science Journals Connector (OSTI)

TiO2-core/ZnO-shell nanorods were synthesized using a two-step process: the synthesis of TiO2 nanorods using a hydrothermal method followed by atomic layer deposition of ZnO. The mean diameter and length of the n...

Sunghoon Park; Soyeon An; Hyunsung Ko; Sangmin Lee; Hyoun Woo Kim…

2014-06-01T23:59:59.000Z

140

Performance improvement of TiO2 supported on adsorbents for photocatalytic degradation of MEK in air  

Science Journals Connector (OSTI)

Photocatalytic degradation of Methyl Ethyl Ketone (MEK) was carried out in gas phase using TiO2 supported on different adsorbents. Based on size and surface area, three different adsorbents, montmorillonite, ?-zeolite and MCM-41 were tested. A fluidised bed annular photoreactor fitted with either 254 or 365 nm lamps was used for the photodegradation studies. The removal rates of MEK were higher for the catalysts supported on the adsorbent as compared to bare TiO2 (Degussa P25 and sol-gel TiO2) due to both improved adsorption and photocatalytic degradation. The photocatalytic activity of the supported TiO2 was maximum around 50 wt.% loading of TiO2. Among all the adsorbents tested, montmorillonite showed better removal rate than MCM-41 and ?-zeolite. Some limited experiments were conducted with Trichloroethylene (TCE) to evaluate the effect of polarity of the organic compound on overall degradation using the supported catalysts.

Pavan Kumar Puttamraju; Madhumita B. Ray

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Holographically Defined TiO2 Electrodes for Dye-Sensitized Solar Cells  

Science Journals Connector (OSTI)

Holographically Defined TiO2 Electrodes for Dye-Sensitized Solar Cells ... We analyze the morphological features of the h-TiO2 electrodes and consider their applicability to dye-sensitized solar cells (DSSCs). ... holographic lithography; solar cells ...

Woo-Min Jin; Ju-Hwan Shin; Chang-Yeol Cho; Ji-Hwan Kang; Jong Hyeok Park; Jun Hyuk Moon

2010-10-27T23:59:59.000Z

142

Inorganic-modified semiconductor TiO2 nanotube arrays for photocatalysis  

E-Print Network [OSTI]

or photoelectrochemical degradation of organic pollutants, the splitting of water into H2, and solar cells holds promise for meeting the global challenge of supplying clean energy. In this context, semiconductor TiO2 stands out and depletion of fossil fuel resources have emerged as two major obstacles for the sustainable development

Lin, Zhiqun

143

Photocatalytic Synthesis of TiO2 and Reduced Graphene Oxide Nanocomposite for Lithium Ion Battery  

Science Journals Connector (OSTI)

In this work, we synthesized graphene oxide (GO) using the improved Hummers’ oxidation method. TiO2 nanoparticles can be anchored on the GO sheets via the abundant oxygen-containing functional groups such as epoxy, hydroxyl, carbonyl, and carboxyl groups ...

Jingxia Qiu; Peng Zhang; Min Ling; Sheng Li; Porun Liu; Huijun Zhao; Shanqing Zhang

2012-06-27T23:59:59.000Z

144

Solar Energy Materials & Solar Cells 71 (2002) 261271 Photoelectric behavior of nanocrystalline TiO2  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 71 (2002) 261­271 Photoelectric behavior of nanocrystalline Ti 100101, People's Republic of China e Synchrotron Radiation Laboratory at Institute of High Energy Physics. A sandwich-type solar cell fabricated by this dye-sensitized nanocrystalline TiO2 film generated 6:1 mA cm�2

Huang, Yanyi

145

Formation and characterization of TiO2/CNT nanomaterials dried under supergravity conditions  

Science Journals Connector (OSTI)

The elaboration of bilayer TiO2/CNT films dried under terrestrial gravity conditions (g) and on a centrifuge with 1.3g and 7g is reported. The changes in microstructure and thickness of these coatings under supergravity environment ...

Minerva Vargas; Marina E. Rincón; Eduardo Ramos

2009-01-01T23:59:59.000Z

146

Short communication Effect of vanadium redox species on photoelectrochemical behavior of TiO2  

E-Print Network [OSTI]

. Alternative and sustainable energy sources such as solar, wind, tidal power, geothermal, hydroelectricity implementation is hydrogen handling. Although molecular hydrogen has very high energy density on a mass basis and TiO2/WO3 photo-electrodes Dong Liu a , Fuqiang Liu a,*, Jianguo Liu b a Electrochemical Energy Lab

Liu, Fuqiang

147

Photocatalytic Degradation of VOC's by TOTO's Hydrotect (TiO2 Impregnated) Surfaces  

E-Print Network [OSTI]

, naturally occurs in wood and volcanic gases. Decaying organic matter can also produce methanol. Paint. This report describes the photocatalytic degradation of formaldehyde and methanol, two common VOC's, by TiO2 and methanol tests (Land et al., 2008). A standardized aqueous solution of formaldehyde and methanol was used

Bergin, Mike

148

Absorption Spectra Related to Heterogeneous Electron Transfer Reactions: The Perylene TiO2 System  

E-Print Network [OSTI]

Absorption Spectra Related to Heterogeneous Electron Transfer Reactions: The Perylene TiO2 System Form: March 16, 2005 Linear absorption spectra of dye-semiconductor systems (perylene attached displaying line broadenings follow the qualitative trend obtained from transient absorption spectra. I

Röder, Beate

149

Non-conductive TiO2 as the anode catalyst support for PEM water electrolysis  

Science Journals Connector (OSTI)

The applicability of a non-conductive TiO2 as the support of the anodic catalyst for PEM water electrolysis was tested. Three TiO2 samples with different specific surface areas were modified by IrO2 using a modified version of the Adams fusion method. A constant weight ratio of IrO2/TiO2 of 0.6 was maintained in all cases. The size, specific surface area and morphology of IrO2 electrocatalyst crystallites were investigated by X-ray diffraction, nitrogen adsorption (BET) and scanning electron microscopy, respectively. The electron conductivity of compressed catalyst powders was evaluated. Their electrochemical properties were studied on a rotating disk electrode (RDE) and finally in a laboratory electrolyser. Utilization of the TiO2 support resulted in a reduction in the size of the IrO2 crystallites. It was found that the lower the specific surface area of the supports, the higher was the electrochemical activity of the catalyst. This is most likely due to the formation of a conductive IrO2 film on the surface of non-conductive supports. For the supports with a higher surface area, the amount of IrO2 used was not sufficient to form an adequately compact film. This resulted in high electron resistance of such a catalyst. The RDE results were confirmed by a laboratory electrolysis test. Taken together with the excellent stability of TiO2 in an anodic environment, these results suggest that these materials are promising supports if the appropriate amount of iridium is deposited.

Petr Mazúr; Jakub Polonský; Martin Paidar; Karel Bouzek

2012-01-01T23:59:59.000Z

150

Available online at www.sciencedirect.com Talanta 74 (2008) 14141419  

E-Print Network [OSTI]

synthesized, such as TiO2, ZnO, ZrO2, Al2O3 and so on [11­14]. Titanium dioxide is a widely used, inorganic 2007 Available online 29 September 2007 Abstract Titanium oxide nanotubes (TiO2-NTs) synthesized B.V. All rights reserved. Keywords: Titanium oxide nanotubes; Hemoglobin; Electrochemistry; Hydrogen

Zheng, Yufeng

151

Nanocrystalline {001} TiO2/carbon aerogel electrode with high surface area and enhanced photoelectrocatalytic oxidation capacity  

Science Journals Connector (OSTI)

Abstract Aiming at further developing the application of the highly reactive {001} TiO2 in photoelectrocatalytic oxidation, which is limited by the powder form, micron-size and low surface area, a nanocrystalline {001} TiO2/carbon aerogel (CA) photoelectrode was fabricated via a facile hydrothermal method. Nano-sized (50 nm) anatase {001} TiO2 was successfully grown on a CA substrate. The obtained photoelectrode endowed high surface area (537 m2 g?1) and enhanced photoelectrocatalytic oxidation performance. Under UV light illumination, the largest photocurrent density is obtained on 50 nm {001} TiO2 (5.58 mA cm?2), compared to 150 nm (4.17 mA cm?2), 1 ?m (2.83 mA cm?2) {001} TiO2, indicating that an obvious enhancement in photoelectrocatalytic oxidation activity was achieved when crystalline size reached nanometer scale. A high methylene blue removal of 93% was obtained on 50 nm {001} TiO2/CA, and the rate constant reached 8.46 × 10?3 min?1, which was twice as that of P25/CA and around twenty times that of 50 nm{001} TiO2/FTO.

Ya-nan Zhang; Yefei Jin; Xiaofeng Huang; Huijie Shi; Guohua Zhao; Hongying Zhao

2014-01-01T23:59:59.000Z

152

Aggregated TiO2 Based Nanotubes for Dye Sensitized Solar Cells  

SciTech Connect (OSTI)

One-dimensional (1D) semiconducting oxides have attracted great attention for dye sensitized solar cells (DSCs), but the overall performance is still quite limited as compared to TiO2 nanocrystalline DSCs. Here, we report the synthesis of aggregated TiO2 based nanotubes with controlled morphologies and crystalline structures to obtain an overall power conversion efficiency of 9.9% using conventional dye without any additional chemical treatment steps. The high efficiency is attributed to the unique aggregate structure for light harvesting, optimized high surface area, and good crystallinity of the nanotube aggregates obtained through proper thermal annealing. This study demonstrates that high efficiency DSCs can be obtained with 1D nanomaterials, and provides lessons on the importance of optimizing both the nanocrystalline structure and the overall microscale morphology.

Nie, Zimin; Zhou, Xiaoyuan; Zhang, Qifeng; Cao, Guozhong; Liu, Jun

2013-11-01T23:59:59.000Z

153

Photocatalysts of Cr Doped TiO2 Film Prepared by Micro Arc Oxidation  

Science Journals Connector (OSTI)

A series of Cr doped TiO2 films were prepared by micro arc oxidation (MAO) using an electrolyte of Na 3PO4+K2Cr2O7. X-ray diffraction and scanning electron microscopy revealed that the films mainly consisted of anatase phase with a porous surface morphology. The films have an excellent photocatalytic effect for degradation of methylene blue and decomposition of water under visible light illumination. This arises from the formation of Cr3+/Cr4+ and oxygen vacancy energy levels owing to Cr doping. The former reduces the electron-hole recombination chance while the latter generates a new gap between the conduction band (CB) and valence band (VB) of TiO2 which lowers the photo energy of the excited electron in the VB to the oxygen vacancy states. The mechanisms for film synthesis during the MAO process are also presented.

Li Wan; Jian-feng Li; Jia-you Feng; Wei Sun; Zong-qiang Mao

2008-01-01T23:59:59.000Z

154

Effect of TiO2 Content on Ethanol Electrooxidation in Alkaline Media Using Pt Nanoparticles Supported on Physical Mixtures of Carbon and TiO2 as Electrocatalysts  

Science Journals Connector (OSTI)

Pt nanoparticles supported on physical mixtures of carbon and TiO2 (Pt/(C?+?TiO2) electrocatalyst) were tested for ethanol electrooxidation in alkaline media. The electrocatalysts were...2 mass ratios using boroh...

R. F. B. De Souza; G. S. Buzzo; J. C. M. Silva; E. V. Spinacé…

2014-04-01T23:59:59.000Z

155

Understanding of catalytic behaviors of TiO2/CuOx catalysts  

SciTech Connect (OSTI)

Aiming to reveal the catalysis at the metal-oxide and oxide-oxide interfaces,1,2 the water-gas shift reaction (WGS, CO + H2O and #61664; CO2 + H2) and CO oxidation (2CO + O2 and #61664; 2CO2) at the interface of the Cu(111) and Cu2O(111) supported TiO2 clusters were studied based on DFT calculations

Kim H. Y.; Liu, P.

2013-09-08T23:59:59.000Z

156

Growth of single-crystalline rutile TiO2 nanorods on fluorine-doped tin oxide glass for organicinorganic  

E-Print Network [OSTI]

, 15] and CdS [2] have been explored and studied to overcome this shortcome, and used in organicGrowth of single-crystalline rutile TiO2 nanorods on fluorine-doped tin oxide glass for organic

Cao, Guozhong

157

TiO2/graphene composite from thermal reaction of graphene oxide and its photocatalytic activity in visible light  

Science Journals Connector (OSTI)

In this study, the P25 TiO2 nanoparticles and graphene sheets (GSs) composite were prepared from a facile thermal reaction of graphene oxide. Its microstructures and photocatalytic properties were ... nm in the a...

Yupeng Zhang; Chunxu Pan

2011-04-01T23:59:59.000Z

158

TiO2-containing PVA/xylan composite films with enhanced mechanical properties, high hydrophobicity and UV shielding performance  

Science Journals Connector (OSTI)

The hydrophilicity/hydrophocbicity of TiO2-enchanced PVA/xylan composite films was performed with an OCA40 ... contact angle value was determined on each film surface at five different locations.

Junli Ren; Shuaiyang Wang; Cundian Gao; Xiaofeng Chen; Weiying Li; Feng Peng

2014-10-01T23:59:59.000Z

159

TiO2-reduced graphene oxide nanocomposite for high-rate application of lithium ion batteries  

Science Journals Connector (OSTI)

TiO2-reduced graphene oxide nanocomposite has been synthesized by a...2 nanoparticle homogenously dispersed onto the reduced graphene oxide sheets. The electrochemistry performance has been...?1 at the rate of 10...

Chuchun Zheng; Chunhua He; Haiyan Zhang; Wenguang Wang; Xinling Lei

2014-06-01T23:59:59.000Z

160

Band Offsets at the Epitaxial Anatase TiO2/n-SrTiO3(001) Interface...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to measure valence band offsets at the epitaxial anatase TiO2(002)n-SrTiO3(001) heterojunction prepared by molecular beam epitaxy, Within experimental error, the valance band...

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Ion engineering techniques for the preparation of the highly effective TiO2 photocatalysts operating under visible light irradiation  

Science Journals Connector (OSTI)

The successful application of ion engineering techniques for the development of TiO2...photocatalysts operating under visible and/or solar light irradiations has been summarized in this review article. First, we ...

Masato Takeuchi; Masaya Matsuoka; Masakazu Anpo

2012-04-01T23:59:59.000Z

162

Electronic and optical proeprties of neon-doped rutile TiO2 from ab inito calculations  

Science Journals Connector (OSTI)

The electronic-structure and optical properties of neon-doped rutile TiO2 have been investigated using density functional theory with Slater type orbitals basis set and correlation. This was done using the PBE me...

Aqeel M. Ali

2012-04-01T23:59:59.000Z

163

Low-Temperature Desorption of N2O from NO on Rutile TiO2(110...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

decreases rapidly as the initially clean, reduced TiO2(110) surface with 5% oxygen vacancies (VO’s) becomes covered with oxygen adatoms and unreacted NO. The maximum...

164

Influence of Metal (Au, Ag) Micro-Grid on the Photocatalytic Activity of TiO2 Film  

Science Journals Connector (OSTI)

In this paper, we prepared TiO2...thin film with the surface modified by a connected Au micro-grid via a microsphere lithography strategy, and the...2 film. The photocatalytic activity improved as Au loading incr...

Chao Cai; Junying Zhang; Feng Pan; Weiwei Zhang; Hailing Zhu…

2008-06-01T23:59:59.000Z

165

Patterned Growth of TiO2 Nanowires on Titanium Substrates Jong-Yoon Ha1;2  

E-Print Network [OSTI]

and short processing time utilizes the Ti foil both as a substrate and as a metal supply, thus eliminating transport methods. Adachi et al. have reported the synthesis of titania NWs using hydrothermal reactions, these methods typically require complex setups and processes, harsh environmental conditions, and extended

Lin, Liwei

166

Influence of O2-induced surface roughening on the chemistry of water on TiO2(110)  

SciTech Connect (OSTI)

The impact of oxygen induced regrowth of TiO2 on the reduced rutile TiO2(110) surface has been studied using temperature programmed desorption (TPD) of adsorbed water multilayers. Pre-exposure of UHV annealed TiO2(110) surfaces to O2 at temperatures from 300 to 850 K induced changes in subsequent water TPDs that were interpreted in terms of the rougher surface morphologies resulting from the regrowth process. Water TPD from TiO2(110) previously oxidized at 300 K exhibited a new peak at *312 K due to reaction of water with O adatoms. These O adatoms were produced by dissociative adsorption of O2 at O-vacancy sites. Additionally, oxygen reacted (slowly) with surface Ti2O3 strands at RT. Water TPD from surfaces pre-oxidized at higher temperatures (P500 K) exhibited features reflective of desorption from rough surfaces, namely loss of peak resolution and eventual merger of the second layer and ice peaks, formation of a high temperature tail on the second layer peak, and broadening of the first layer TPD peak. The multiplicity of kinetically different adsorption sites on the roughened TiO2(110) surfaces contributed to the widening of the desorption features. Published by Elsevier B.V.

Zehr, Robert T.; Henderson, Michael A.

2008-04-15T23:59:59.000Z

167

Photocatalytic remediation of indoor pollution by transparent TiO2 films  

Science Journals Connector (OSTI)

Abstract Transparent, mechanically robust TiO2 films obtained by an innovative electrochemically assisted procedure are presented as effective photocatalysts for environmental remediation and self-cleaning. The film morphology and optical properties were investigated by scanning electron microscopy (SEM), and UV–vis spectroscopy. Mechanical tests (Wolff Wilborn hardness and adhesion tests) proved the high robustness of the layer. The film thickness could be modulated by varying the number of deposited layers (from 1 to 5) without altering the film transparency. A fast light-induced superhydrophilicity is observed even under solar irradiation. The photocatalytic remediation activity of the films was tested under UV and solar irradiation towards two different systems: the gas phase degradation of volatile organic compounds, \\{VOCs\\} (ethanol and acetaldehyde) and the degradation of dry stains of long chain organic molecules (siloxanes) adsorbed at the film surface to simulate the staining by fingerprints/oily liquids. The titania layers showed excellent photocatalytic activity in both tested systems under UV and simulated solar irradiation. The photocatalyst deactivation upon repeated degradation tests was observed to be very limited. The presented stable and transparent TiO2 layers represent promising materials for photocatalytic windows and coatings.

Alice Antonello; Guido Soliveri; Daniela Meroni; Giuseppe Cappelletti; Silvia Ardizzone

2014-01-01T23:59:59.000Z

168

Influence of ultraviolet light irradiation on corrosion behavior of weathering steel with and without TiO2-coating in 3 mass% NaCl solution  

Science Journals Connector (OSTI)

In this study the influence of ultraviolet (UV) light on the corrosion behavior of weathering steel with and without TiO2 coating has been investigated in 3% NaCl solution, using anodic polarization, dipping and dropping tests. In polarization tests a large negative shift of corrosion potential appeared for the TiO2-coated specimen in UV light. The weight loss of the steels with and without TiO2 film increased under UV light in the dipping test, while they decreased in the dropping test. The rust formed on the weathering steel showed a semiconductor like behavior, similar to that shown by TiO2 film.

Manal G. Mahmoud; Rongguang Wang; Masahiko Kato; Keijiro Nakasa

2005-01-01T23:59:59.000Z

169

Bisphosphine dioxides  

DOE Patents [OSTI]

A process is described for the production of organic bisphosphine dioxides from organic bisphosphonates. The organic bisphosphonate is reacted with a Grignard reagent to give relatively high yields of the organic bisphosphine dioxide.

Moloy, K.G.

1990-02-20T23:59:59.000Z

170

Fabrication of TiO2 film with different morphologies on Ni anode and application in photoassisted water electrolysis  

Science Journals Connector (OSTI)

The anode of an alkaline electrolytic cell for water electrolysis was modified by TiO2 photocatalysts with different morphologies. The water electrolysis was coupled with photocatalytic decomposition of water by irradiation of UV light on the modified anode. And a feasible process for the hydrogen production of water electrolysis assisted by photocatalysis (WEAP) was proposed and experimentally confirmed. The results show that the highly ordered, vertically oriented tubular arrays structure on Ni anode surface has better hydrogen production performance than random TiO2. In WEAP process, the maximum rate of hydrogen production is 2.77 ml/(h*cm2) when the anode modified by ordered TiO2 nanotube arrays, compared to traditional alkaline electrolytic cell for water electrolysis with Ni anode, H2-production rate increased by 139%.

Hongbo He; Aiping Chen; Hui Lv; Haijun Dong; Ming Chang; Chunzhong Li

2013-01-01T23:59:59.000Z

171

XAFS Study of Active Tungsten Species on WO3/TiO2 as a Catalyst for Photo-SCR  

SciTech Connect (OSTI)

The activity of the photo-assisted selective catalytic reduction of NO with NH3 (photo-SCR) was enhanced by the addition of WO3 to TiO2. From the result of XAFS analysis, the W species on TiO2 had a WO4 tetrahedral structure and agglutination took place as the addition of WO3 was increased. We conclude that the isolated W species enhances the surface acidity and photo-SCR activity whereas the agglutinated W species is an inactive species.

Yamazoe, Seiji; Masutani, Yasuyuki; Shishido, Tetsuya; Tanaka, Tsunehiro [Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510 (Japan)

2007-02-02T23:59:59.000Z

172

Preparation of TiO2(110)-(1x1) Surface via UHV Cleavage: An scanning tunneling microscopy study  

SciTech Connect (OSTI)

TiO2(110) surface was successfully prepared in-situ by UHV cleaving of a commercial TiO2 crystal.. STM imaging revealed atomically flat more than 1 ?m wide terraces with (110) orientation separated by steps running in [001] direction, with very low kink density. Atomically resolved STM images show periodicity in the [001] and [ ] directions with the unit cell parameters measured to ~3 Å and 6.5 Å respectively which are closed to the expected values of bulk terminated (1x1) surface.

Bondarchuk, Olexsandr; Lyubinetsky, Igor

2007-11-26T23:59:59.000Z

173

Thermal Processing and Characterizations of Dye-Sensitized Solar Cells Based on Nanostructured TiO2  

Science Journals Connector (OSTI)

Thermal Processing and Characterizations of Dye-Sensitized Solar Cells Based on Nanostructured TiO2 ... This work reports an extensive study about the effects of thermal treatments on the performance of TiO2-based dye-sensitized solar cells. ... The current–voltage characteristics were measured using an Advantest R6243 current/voltage unit after a 10 min wait for achieving thermal equilibrium under AM 1.5G, simulated solar light of 100 mW cm–2 and irradiated from a WACOM super solar simulator. ...

Filippo Fabbri; Francesca Detto; Nicola Armani; Norifusa Satoh; Tullo Besagni; Maura Pavesi; Giancarlo Salviati

2013-01-04T23:59:59.000Z

174

The Materials Science of Titanium Dioxide Memristors  

E-Print Network [OSTI]

unipolar resistance switching,” Advanced Materials, vol. 20,A variety of resistance switching materials could be used3 for resistance-change memory,” Advanced Materials, vol.

Pickett, Matthew

2010-01-01T23:59:59.000Z

175

The Materials Science of Titanium Dioxide Memristors  

E-Print Network [OSTI]

Park, D. -j. Seong, W. Lee, M. Hasan, G. - Y. Jung, and H.vol. 93, no. 22, [38] M. Hasan, R. Dong, H. J. Choi, D. S.for switching in SrTiO 3 . Hasan et al. also used pulsed

Pickett, Matthew

2010-01-01T23:59:59.000Z

176

Surface Science Perspectives Dispersed Au atoms, supported on TiO2(110)  

E-Print Network [OSTI]

activation energy for the oxidation of carbon monoxide? Many factors could con- tribute. For example); Catalysis; Gold; Titanium oxide; Surface defects At the end of the 1980s Haruta and coworkers made

Diebold, Ulrike

177

Acetone-Assisted Oxygen Vacancy Diffusion on TiO2(110)  

SciTech Connect (OSTI)

We have studied the dynamic relationship between acetone and bridge-bonded oxygen (Ob) vacancy (VO) defect sites on the TiO2(110)-1 × 1 surface using scanning tunneling microscopy (STM) and density function theory (DFT) calculations. We report an adsorbate-assisted VO diffusion mechanism. The STM images taken at 300 K show that acetone preferably adsorbs on the VO site and is mobile. The sequential isothermal STM images directly show that the mobile acetone effectively migrates the position of VO by a combination of two acetone diffusion channels: one is the diffusion along the Ob row and moving as an alkyl group, which heals the initial VO; another is the diffusion from the Ob row to the fivecoordinated Ti4+ row and then moving along the Ti4+ row as an acetone, which leaves a VO behind. The calculated acetone diffusion barriers for the two channels are comparable and agree with experimental results.

Xia, Yaobiao; Zhang, Bo; Ye, Jingyun; Ge, Qingfeng; Zhang, Zhenrong

2012-10-18T23:59:59.000Z

178

Charge transfer from TiO2 into adsorbed benzene diazonium compounds Tel-Aviv University, School of Electrical Engineering, Ramat-Aviv 69978, Israel  

E-Print Network [OSTI]

Charge transfer from TiO2 into adsorbed benzene diazonium compounds A. Merson Tel-Aviv University (Received 24 February 2004; accepted 8 June 2004) Electron transfer from sol­gel­prepared TiO2 into adsorbed are stably adsorbed. The potential of maximum current Upeak depends strongly on the diazonium salt. Upeak

Shapira, Yoram

179

Describing excited state relaxation and localization in TiO2 nanoparticles using TD-DFT  

SciTech Connect (OSTI)

We have investigated the description of excited state relaxation in naked and hydrated TiO2 nanoparticles using Time-Dependent Density Functional Theory (TD-DFT) with three common hybrid exchange-correlation (XC) potentials; B3LYP, CAM-B3LYP and BHLYP. Use of TD-CAM-B3LYP and TD-BHLYP yields qualitatively similar results for all structures, which are also consistent with predictions of coupled cluster theory for small particles. TD-B3LYP, in contrast, is found to make rather different predictions; including apparent conical intersections for certain particles that are not observed with TD-CAM-B3LYP nor with TD-BHLYP. In line with our previous observations for vertical excitations, the issue with TD-B3LYP appears to be the inherent tendency of TD-B3LYP, and other XC potentials with no or a low percentage of Hartree-Fock Like Exchange, to spuriously stabilize the energy of charge-transfer (CT) states. Even in the case of hydrated particles, for which vertical excitations are generally well described with all XC potentials, the use of TD-B3LYP appears to result in CT-problems for certain particles. We hypothesize that the spurious stabilization of CT-states by TD-B3LYP even may drive the excited state optimizations to different excited state geometries than those obtained using TD-CAM-B3LYP or TD-BHLYP. Finally, focusing on the TD-CAM-B3LYP and TD-BHLYP results, excited state relaxation in naked and hydrated TiO2 nanoparticles is predicted to be associated with a large Stokes’ shift.

Berardo, Enrico; Hu, Hanshi; van Dam, Hubertus JJ; Shevlin, S. A.; Woodley, Scott M.; Kowalski, Karol; Zwijnenburg, Martijn A.

2014-10-30T23:59:59.000Z

180

BiOI nanosheets decorated TiO2 nanofiber: Tailoring water purification performance of photocatalyst in structural and photo-responsivity aspects  

Science Journals Connector (OSTI)

Abstract Microscopic structure and photo-responsive characters are two important facets that dominate the synthetic performance of photocatalysts in environment remediation. In the present investigation, we report the simultaneous tailoring of these two facets toward improving the water purification performance of TiO2 based photocatalyst. Electrospinning-derived TiO2 nanofibers were decorated with the visible-light responsive BiOI nanosheets via a simple hydrothermal reaction approach, constructing heterostructured composite fibers. The obtained hierarchical TiO2@BiOI fibers demonstrated improved reactivity toward decomposition of Rhodamine B in the visible-light range over the pristine TiO2 nanofibers, meanwhile possessed high recycling convenience. The mechanism for advancement of the photocatalytic reactivity of the TiO2@BiOI fibers was elucidated by analyzing the results of photoluminescence and transient photocurrent response.

Chenxing Liao; Zhijun Ma; Guoping Dong; Jianrong Qiu

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Large Polyoxotitanate Clusters: Well-Defined Models for Pure-Phase TiO2 Structures and Surfaces  

Science Journals Connector (OSTI)

Figure 2. Experimental XRD powder patterns of commercially available TiO2 (Degussa P25, red line) and powder obtained from reactions at 160 °C (blue line) overlaid with calculated powder pattern for anatase (green line) using Mercury (fwhm = 0.7°). ...

Jason B. Benedict; Renata Freindorf; Elzbieta Trzop; Jeffrey Cogswell; Philip Coppens

2010-09-13T23:59:59.000Z

182

19.2% Efficient InP Heterojunction Solar Cell with Electron-Selective TiO2 Contact  

E-Print Network [OSTI]

19.2% Efficient InP Heterojunction Solar Cell with Electron-Selective TiO2 Contact Xingtian Yin of California, Berkeley, California 94720, United States Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States § Electronic Materials Research Laboratory

Javey, Ali

183

Nano TiO2 as a New Tool for Mothproofing of Wool: Protection of Wool against Anthrenus verbasci  

Science Journals Connector (OSTI)

Nano TiO2 as a New Tool for Mothproofing of Wool: Protection of Wool against Anthrenus verbasci ... 2.3 Scouring and Bleaching Treatment ... Scouring of wool fabrics was performed using 1% nonionic detergent (based on weight of fabric, OWF) at 60 °C for 60 min with a liquor to goods ratio of 30:1. ...

Ali Nazari; Majid Montazer; Mehdi Dehghani-Zahedani

2012-12-31T23:59:59.000Z

184

Heterogeneous deposition of Cu2O nanoparticles on TiO2 nanotube array films in organic solvent  

Science Journals Connector (OSTI)

A novel method for decoration of anodic TiO2 nanotube array films (NAFs) with Cu2O nanoparticles has been reported. The method is based on the reduction of Cu(II) in a mixture of ethylene glycol and N, N-dimethylformamide at 120°C ...

Xinwen Huang; Zongjian Liu

2013-01-01T23:59:59.000Z

185

Hierarchically Structured Microspheres for High-Efficiency Rutile TiO2Based Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

candidate for use in water splitting, photo- catalysis, sensors, and dye-sensitized solar cells (DSSCs) overHierarchically Structured Microspheres for High-Efficiency Rutile TiO2Based Dye-Sensitized Solar and the Ostwald ripening process. Dye-sensitized solar cells (DSSCs) assembled by employing these complex rutile

Lin, Zhiqun

186

Low-temperature TiO2 Films for Dye-sensitized Solar Cells: Factors Affecting Energy Conversion Efficiency  

Science Journals Connector (OSTI)

Low-temperature TiO2 Films for Dye-sensitized Solar Cells: Factors Affecting Energy Conversion Efficiency ... The difference in short-circuit current is a factor of 2.2 with the Ru-based dye N719 and is 3.5 with the organic dye D5. ...

Alexander G. Agrios; Anders Hagfeldt

2008-06-18T23:59:59.000Z

187

Comment on “Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles”  

Science Journals Connector (OSTI)

Comment on “Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles” ... We can suggest at least three more likely (than Ti4+) sources for their mysterious electron donor:? (1) an overlooked inorganic species, (2) Ti3+, and/or (3) organic impurities. ...

Craig L. Perkins; Michael A. Henderson; David E. McCready; Greg S. Herman

2000-12-05T23:59:59.000Z

188

Chemically grown TiO2 on glass with superior photocatalytic properties G. Kenanakis a,b,  

E-Print Network [OSTI]

suspensions or in small-scale purification systems, thus limiting their practical use due to difficulties of photocatalysis for various applications such as water treatment, air purification and fuel cells [1­5]. TiO2 techniques [8­10]. Since then, many large scale deposition techniques, such as doctor blade and spray coating

189

Photooxidation and Photodesorption in the Photochemistry of Isobutene on TiO2(110)  

SciTech Connect (OSTI)

The photochemistry of isobutene was examined on the rutile TiO2(110) surface as a function of the surface pretreatment condition and irradiation temperature using temperature programmed desorption (TPD) and photon stimulated desorption (PSD). Isobutene adsorbs molecularly on the clean TiO2(110) surface without detectable thermal decomposition. Preadsorption of oxygen, either as atoms or chemisorbed molecules, did not promote thermal reactions with isobutene, but instead blocked isobutene adsorption sites. Ultraviolet (UV) light irradiation of isobutene adsorbed on the clean surface led to depletion through photodesorption without significant photodecomposition. Isobutene PSD yields increased with increasing surface temperature suggesting that activated molecules sample their physisorbed potential energy surface during photodesorption. Preadsorption of oxygen promoted partial photooxidation of adsorbed isobutene to acetone, methacrolein and isobutanal. Acetone was only detected when molecular oxygen was present, indicating that O2 addition occurred across the C=C bond. In contrast, results from use of D6-isobutene indicated that coadsorption with either O adatoms or O2 molecules led to photochemical production of methacrolein (and likely isobutanal) through C-H bond cleavage on a methyl group. Irradiation an adlayer comprised of isobutene isolated from the surface by 1 ML of preadsorbed O2 showed the most photoconversion of isobutene, which suggests that photoactivation of adsorbed O2 is a key step in partial photooxidation of isobutene. Comparison of the isobutene PSD and oxidation product yields as a function of surface temperature between 20 and 120 K indicates a competition between photooxidation and photodesorption that varies with temperature. ‘Direct’ charge transfer events between isobutene and the surface, favored at higher temperature, compete with partial oxidation pathways initiated by ‘indirect’ activation of isobutene by O2, which is favored at low temperature. Access of O2 to the surface is critical to achieving desired isobutene photooxidation rates and products, and isobutene photodesorption may provide a means of regulating the isobutene surface coverage. Work reported here was supported by the U.S. Department of Energy, Office of Basic Energy Science, Division of Chemical Sciences, Geosciences, and Biosciences, and performed in the Williams R. Wiley Environmental Molecular Science Laboratory (EMSL), a Department of Energy user facility funded by the Office of Biological and Environmental Research. Pacific Northwest National Laboratory is a multiprogram national laboratory operated for the U.S. Department of Energy by the Battelle Memorial Institute under contract DEAC05-76RL01830.

Henderson, Michael A.

2013-07-11T23:59:59.000Z

190

Composite materials and bodies including silicon carbide and titanium diboride and methods of forming same  

DOE Patents [OSTI]

Methods of forming composite materials include coating particles of titanium dioxide with a substance including boron (e.g., boron carbide) and a substance including carbon, and reacting the titanium dioxide with the substance including boron and the substance including carbon to form titanium diboride. The methods may be used to form ceramic composite bodies and materials, such as, for example, a ceramic composite body or material including silicon carbide and titanium diboride. Such bodies and materials may be used as armor bodies and armor materials. Such methods may include forming a green body and sintering the green body to a desirable final density. Green bodies formed in accordance with such methods may include particles comprising titanium dioxide and a coating at least partially covering exterior surfaces thereof, the coating comprising a substance including boron (e.g., boron carbide) and a substance including carbon.

Lillo, Thomas M.; Chu, Henry S.; Harrison, William M.; Bailey, Derek

2013-01-22T23:59:59.000Z

191

Ultraviolet and Visible Photochemistry of Methanol at 3D Mesoporous Networks: TiO2 and Au–TiO2  

Science Journals Connector (OSTI)

A higher excited-state electron density arises for UV-irradiated TiO2 aerogel relative to commercial nanoparticulate TiO2, indicating that 3D networked TiO2 more efficiently separates electron–hole pairs. ... For both UV and visible irradiation, the same light source was employed: a high-pressure 350-W mercury arc lamp (Oriel Corp.) equipped with a water filter to remove IR radiation. ... For visible irradiation, three bandpass filters (70 nm full-width at half-maximum transmission profile) were used with peak transmissions centered at 400, 500, or 550 nm. ...

Dimitar A. Panayotov; Paul A. DeSario; Jeremy J. Pietron; Todd H. Brintlinger; Lindsey C. Szymczak; Debra R. Rolison; John R. Morris

2013-05-23T23:59:59.000Z

192

Highly Efficient Dye-Sensitized Solar Cells by Using a Mesostructured Anatase TiO2 Electrode with High Dye Loading Capacity  

Science Journals Connector (OSTI)

Highly Efficient Dye-Sensitized Solar Cells by Using a Mesostructured Anatase TiO2 Electrode with High Dye Loading Capacity ... The growth and assembly of TiO2 nanostructures with enhanced charge transfer and light harvesting have attracted much attention for fabricating highly efficient dye-sensitized solar cells. ... The photovoltaic measurements indicate that the mesoporous TiO2 layer enhances the dye loading capacity, the electron transfer efficiency, and the photocurrent of the cell, contributing to the significant improvement of the energy conversion efficiency of the dye-sensitized solar cells. ...

Wei Shao; Feng Gu; Chunzhong Li; Mengkai Lu

2010-09-03T23:59:59.000Z

193

Electronic and optical properties of Cr and Cr–N doped anatase TiO2 from screened Coulomb hybrid calculations  

Science Journals Connector (OSTI)

We studied the electronic and atomic structures of anatase TiO2 codoped with Cr and N using hybrid density functional theory calculations. The nonlocal screened Hartree–Fock exchange energy is partially mixed with the traditional semilocal exchange energy. This not only patches the bandgap underestimation but also improves the description of the anion/cation-driven impurity states and the magnetization of the dopants. Cr and/or N doping modifies the valence and conduction band edges of TiO2, leading to significant bandgap reduction. Hence, Cr, N and Cr–N doped TiO2 are promising for enhanced visible light absorbance.

Veysel Çelik; Ersen Mete

2013-01-01T23:59:59.000Z

194

OH Group Dynamics of 1, 3-propanediol on TiO2(110)  

SciTech Connect (OSTI)

Variable-temperature scanning tunneling microscopy and dispersion-corrected density functional theory were employed to study the interaction of 1,3 propanediol with reduced TiO2(110) surfaces. We find that at 300 K, 1,3-propanediol molecules dissociate via O-H bond scission of one of the OH groups on bridge-bonded oxygen (Ob) vacancy (VO) defects forming pairs of monoalkoxide (Ob-(CH2)3-OH) and bridge-bonded bonded hydroxyl (HOb) species. The OH group of the monoalkoxide species is bound to the adjacent 5-coordinated Ti4+ (Ti5c) sites. The Ob-(CH2)3-OH species are observed to rotate around their Ob anchor, switching the position of the OH between the two adjacent Ti5c rows. The rotating species are found to assist the cross-Ob row HOb hydrogen transfer. The OH group of the monoalkoxide species is further observed to dissociate forming bidentate type dioxo (Ob-(CH2)3-"O" _(?"Ti" ?_"5c" )) species and an additional HOb. The reversible interconversion between the mono- and di-oxo species illustrates a formation of the equilibrium between these conjugate acid/base pairs.

Zhang, Zhenrong; Yoon, Yeohoon; Lin, Xiao; Acharya, Danda P.; Kay, Bruce D.; Rousseau, Roger J.; Dohnalek, Zdenek

2012-11-15T23:59:59.000Z

195

Comment on "Structure and dynamics of liquid water on rutile TiO2(110)  

SciTech Connect (OSTI)

Liu and co-workers [Phys. Rev. B 82, 161415 (2010)] discussed the long-standing debate regarding whether H2O molecules on the defect-free (110) surface of rutile ( -TiO2) sorb associatively, or there is dissociation of some or all first-layer water to produce hydroxyl surface sites. They conducted static density functional theory (DFT) and DFT molecular dynamics (DFT-MD) investigations using a range of cell configurations and functionals. We have reproduced their static DFT calculations of the influence of crystal slab thickness on water sorption energies. However, we disagree with several assertions made by these authors: (a) that second-layer water structuring and hydrogen bonding to surface oxygens and adsorbed water molecules are weak ; (b) that translational diffusion of water molecules in direct contact with the surface approaches that of bulk liquid water; and (c) that there is no dissociation of adsorbed water at this surface in contact with liquid water. These assertions directly contradict our publishedwork, which compared synchrotron x-ray crystal truncation rod, second harmonic generation, quasielastic neutron scattering, surface charge titration, and classical MD simulations of rutile (110) single-crystal surfaces and (110)-dominated powders in contact with bulk water, and (110)-dominated rutile nanoparticles with several monolayers of adsorbed water.

Wesolowski, David J [ORNL; Sofo, Jorge O. [Pennsylvania State University; Bandura, Andrei V. [St. Petersburg State University, St. Petersburg, Russia; Zhang, Zhan [Argonne National Laboratory (ANL); Mamontov, Eugene [ORNL; Predota, M. [University of South Bohemia, Czech Republic; Kumar, Nitin [ORNL; Kubicki, James D. [Pennsylvania State University; Kent, Paul R [ORNL; Vlcek, Lukas [ORNL; Machesky, Michael L. [Illinois State Water Survey, Champaign, IL; Fenter, Paul [Argonne National Laboratory (ANL); Cummings, Peter T [ORNL; Anovitz, Lawrence {Larry} M [ORNL; Skelton, A A [Vanderbilt University; Rosenqvist, Jorgen K [ORNL

2012-01-01T23:59:59.000Z

196

Charge transport in TiO2/MEH-PPV polymer photovoltaics  

Science Journals Connector (OSTI)

We study the effect of polymer thickness, hole mobility, and morphology on the device properties of polymer-based photovoltaics consisting of MEH-PPV as the optically active layer, TiO2 as the exciton dissociation surface, and ITO and Au electrodes. We demonstrate that the conversion efficiency in these polymer-based photovoltaics is primarily limited by the short exciton diffusion length combined with a low carrier mobility. For MEH-PPV devices with optimal device geometry, we achieve quantum efficiencies of 6% at the maximum absorption of the polymer, open circuit voltages of 1.1 V, current densities of 0.4 mA/cm2 and rectification ratios greater than 105 under 100 mW/cm2 white light illumination. In addition, we achieve fill factors up to 42% at high light intensities and as high as 69% at low light intensities. We conclude by presenting a model that describes charge transport in solid-statepolymer/TiO2-based photovoltaics and suggest methods for improving energy conversion efficiencies in polymer-based photovoltaics.

A. J. Breeze; Z. Schlesinger; S. A. Carter; P. J. Brock

2001-09-10T23:59:59.000Z

197

The role of vacancies, impurities and crystal structure in the magnetic properties of TiO2  

E-Print Network [OSTI]

We present an ab initio study of pure and doped TiO2 in the rutile and anatase phases. The main purpose of this work is to determine the role played by different defects and different crystal structures in the appearance of magnetic order. The calculations were performed for varying impurity and vacancy concentrations in both TiO2 structures. For Co impurities the local magnetic moment remained almost independent of the concentration and distribution while for Cu this is not the case, there is magnetism for low concentrations that disappears for the higher ones. Impurity-impurity interactions in both structures favor linear ordering of them. Magnetism in un-doped samples appears for certain vacancy concentrations and structural strain.

Mariana Weissmann; Leonardo A. Errico

2007-04-20T23:59:59.000Z

198

Identification of the Active Species in Photochemical Hole Scavenging Reactions of Methanol on TiO2  

SciTech Connect (OSTI)

Molecular and dissociative methanol adsorption species were prepared on rutile TiO2(110) surfaces to study photocatalytic oxidation of methanol in ultrahigh vacuum (UHV) using temperature-programmed desorption (TPD). Adsorbed methoxy groups (CH3O-) were found to be the photoactive form of adsorbed methanol converted to adsorbed formaldehyde and a surface OH group by hole-mediated C-H bond cleavage. These results suggest that adsorbed methoxy is the effective hole scavenger in photochemical reactions involving methanol.

Shen, Mingmin; Henderson, Michael A.

2011-11-03T23:59:59.000Z

199

Comparison of hydrophilic properties of TiO2 thin films prepared by solgel method and reactive magnetron sputtering system  

E-Print Network [OSTI]

magnetron sputtering system S.-H. Nam a, , S.-J. Cho a , C.-K. Jung a , J.-H. Boo a, , J. Sícha b , D. Heman substoichiometric TiO2 - x targets of 50 mm in diameter. Dual magnetron supplied by dc bipolar pulsed power source of hazardous volatile organic compounds (VOC), the removal of endocrine disrupters, the recovery of heavy metal

Boo, Jin-Hyo

200

Abatement of 3-methylbutanal and trimethylamine with combined plasma1 and photocatalysisin a continuous planar reactor2  

E-Print Network [OSTI]

titanium dioxide (TiO2) and the gas phase [9, 40, 42, 43]. The catalyst47 is activated by photons provided[5], combustion [6], adsorption [7], absorption and44 photocatalysis [3, 8,14, 39, 40, 42

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Electronic and transport properties of reduced and oxidized nanocrystalline A. Rothschilda)  

E-Print Network [OSTI]

. © 2003 American Institute of Physics. DOI: 10.1063/1.1539556 Nanocrystalline titanium dioxide (TiO2) has- tive to gas adsorption. A correlation between the surface and GB potential bar- riers

Shapira, Yoram

202

Optimization of nano TiO2 pretreatment on free acid dyeing of wool using central composite design  

Science Journals Connector (OSTI)

Abstract The aim of the research is to investigate nano technique of wool acid dyeing without the presence of acid auxiliary agent at temperatures lower than the boiling. The wool fabrics are first pretreated with nano TiO2 and BTCA at different concentrations. The dyeing process is then carried out on the pretreated fabrics with C. I. Acid Blue 113 and C. I. Acid Black 3 dyes. Also, the central composite design analysis is applied to design the relation between nano TiO2 and BTCA concentrations, and dye exhaustion. The response surface methodology is also applied to find the optimum conditions for the wool fabric pretreatment. The scanning electron microscopy and X-ray diffraction are employed to indicate the presence, crystal type and size of TiO2 nanoparticles on the wool surface. The pretreatment optimization on the wool surfaces considerably enhances the absorption of acid dyes. The suggested method demonstrates the improvement of fastness properties than control dyeing and could be introduced as a new route, disclosing various desirable multi-functional characteristics, to wool fabric. This technique is also free from some of the disadvantages of acid chemical involved in dyeing such as damage to wool fabrics than wool conventional dyeing.

Ali Nazari; Mohammad Mirjalili; Navid Nasirizadeh; Shahab Torabian

2014-01-01T23:59:59.000Z

203

Investigation of phase transitions for the hydrothermal formation of TiO2 in the presence of F? ions  

Science Journals Connector (OSTI)

The hydrothermal phase transition of ammonium titanate into TiO2 in aqueous ammonia media was investigated in the presence of F? ions by adding various kinds of electrolytes such as NaCl, NH4Cl, NaF, and NH4F. The phase composition and the morphologies of the products were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). With the assistance of F? ions, pure brookite TiO2 can be hydrothermally prepared with a wide range of Na+ ion concentrations from 0.25 M to 1.5 M in just 24 h, which has obvious advantages over the previous NaCl scheme [1,2]. Moreover, photocatalytic degradation of MO shows that both anatase and brookite prepared in the presence of F? ions show superior photocatalytic activities than those prepared in the absence of F? ions. The phase transition mechanism from ammonium titanate into TiO2 was also proposed. Besides the introduction of Na+ ions that benefits the phase transition from titanate to brookite, F? ions are suggested to play two key roles during the hydrothermal process: catalyzing the condensation reaction of TiOH to produce TiOTi linkages by forming TiF and regulating the intercalation and the de-intercalation of Na+ ions by counteracting the electrostatic interaction between the Na+ ions and the titanate layers.

Hongyun Yang; Feng Chen; Yanchao Jiao; Jinlong Zhang

2013-01-01T23:59:59.000Z

204

Effect of chromium oxide as active site over TiO2-PILC for selective catalytic oxidation of NO  

Science Journals Connector (OSTI)

Abstract This study introduced TiO2-pillared clays (TiO2-PILC) as a support for the catalytic oxidation of NO and analyzed the performance of chromium oxides as the active site of the oxidation process. Cr-based catalysts were prepared by a wet impregnation method. It was found that the 10 wt.% chromium doping on the support achieved the best catalytic activity. At 350°C, the NO conversion was 61% under conditions of GHSV = 23600 hr?1. The BET data showed that the support particles had a mesoporous structure. H2-TPR showed that Cr(10)TiP (10 wt.% Cr doping on TiO2-PILC) clearly exhibited a smooth single peak. EPR and XPS were used to elucidate the oxidation process. During the NO + O2 adsorption, the intensity of evolution of superoxide ions (O2?) increased. The content of Cr3+ on the surface of the used catalyst was 40.37%, but when the used catalyst continued adsorbing NO, the Cr3+ increased to 50.28%. Additionally, O?/O? increased markedly through the oxidation process. The NO conversion decreased when SO2 was added into the system, but when the SO2 was removed, the catalytic activity recovered almost up to the initial level. FT-IR spectra did not show a distinct characteristic peak of SO42?.

Jingxin Zhang; Shule Zhang; Wei Cai; Qin Zhong

2013-01-01T23:59:59.000Z

205

Hierarchical 3D dendritic TiO2 nanospheres building with ultralong 1D nanoribbon/wires for high performance concurrent photocatalytic membrane water purification  

Science Journals Connector (OSTI)

Abstract Hierarchical 3D dendritic TiO2 nanospheres building with ultralong 1D TiO2 nanoribbon/wires were hydrothermally synthesized via controlling the hydrolysis rate of precursor by EG. It is found that the EG and Cl? in the precursor solution are the dominant factors in controlling the hydrolysis rate of Ti4+ from TTIP, and the growing direction of 1D TiO2, respectively. Through optimizing the molar ratio of TTIP:EG, hierarchical 3D dendritic TiO2 nanospheres building with long 1D nanoribbons (TiO2 nanoribbon spheres) were synthesized at a molar ratio of TTIP:EG = 1:2. And hierarchical 3D dendritic TiO2 nanospheres building with even longer and thinner 1D TiO2 nanowires (TiO2 nanowire spheres) were synthesized via further reducing the hydrolysis rate of Ti4+ by increasing the content of EG at a molar ratio of TTIP:EG = 1:3. The hierarchical 3D dendritic TiO2 nanoribbon/wire spheres were well characterized by a variety of techniques such as FESEM, TEM, XRD, N2 adsorption/desorption, UV–vis spectra, etc. A “win–win” strategy was developed to integrate the hierarchical TiO2 nanoribbon/wire spheres and membrane for high performance photocatalytic membrane water purification through maximizing the advantages of TiO2 photocatalysis and membrane, while minimizing their disadvantages. Hierarchical TiO2 nanoribbon/wire spheres exhibited high performance for water purification in terms of high flux, low fouling, high removal rate of pollutants, and long lifespan of membrane, both in concurrent dead end and cross flow membrane system. The rationale behind this phenomenon lies in that the hierarchical TiO2 nanoribbon/wire spheres in the concurrent system possess the advantages of mitigating the membrane fouling via photocatalytic degrading the organic pollutants relying on their high photocatalytic activities; and keeping high water flux owing to the porous functional layer favorable for water pass through. The experimental results demonstrated that the hierarchical TiO2 nanoribbon/wire spheres have better photodegradation ability of AO 7 and RhB pollutants so as to result in higher ability in mitigating fouling, and keep higher flux than TiO2 P25 under the same conditions. It is believable that this study is of great significances both in synthesizing hierarchical 3D dendritic TiO2 nanospheres building with ultralong 1D nanoribbon/wires, and in providing a “win–win” strategy for high performance concurrent photocatalytic membrane water purification featured as high flux, high removal rate of pollutants, low fouling and long membrane lifespan.

Hongwei Bai; Lei Liu; Zhaoyang Liu; Darren Delai Sun

2013-01-01T23:59:59.000Z

206

Organic solvent based TiO2 dispersion paste for dye-sensitized solar cells prepared by industrial production level procedure  

Science Journals Connector (OSTI)

In order to prepare the TiO2...liquid dispersions for the electrodes of dye-sensitized solar cells with industrial mass production level at a reasonable cost, the present...2 liquid dispersions by a general indus...

Ryohei Mori; Tsutomu Ueta; Kazuo Sakai; Yasuhiro Niida…

2011-03-01T23:59:59.000Z

207

Process development of a novel arc spray nanoparticle synthesis system (ASNSS) for preparation of a TiO 2 nanoparticle suspension  

Science Journals Connector (OSTI)

This article presents the development of an innovative technology to manufacture TiO2...nanoparticles. Manufacturing nanoparticles is considered as a crucial step towards product and process innovation. In our pr...

Tsing-Tshih Tsung; Ho Chang; Liang-Chia Chen…

2004-12-01T23:59:59.000Z

208

Solar Energy Materials & Solar Cells 87 (2005) 181196 Optical filters from SiO2 and TiO2 multi-layers  

E-Print Network [OSTI]

Solar Energy Materials & Solar Cells 87 (2005) 181­196 Optical filters from SiO2 and TiO2 multi Abstract Sol­gel spin coating process is used to produce optical filters from SiO2 and TiO2 multi- layers­19] properties. They vary according to the chosen substrate, sol, central wavelength, number of layers, optical

Thirumalai, Devarajan

209

Conversion of 1,3-Propylene Glycol on Rutile TiO2(110)  

SciTech Connect (OSTI)

The adsorption of 1,3-propylene glycol (1,3-PG) on partially reduced TiO2(110) and its conversion to products have been studied by a combination of molecular beam dosing and temperature programmed desorption (TPD). When the Ti surface sites are saturated by 1,3-PG, ~80% of the molecules undergo further reactions to yield products that are liberated during the TPD ramp. In contrast to ethylene glycol (EG) and 1,2- propylene glycol (1,2-PG) that yield only alkenes and water at very low coverages (< 0.05 ML), two additional products, HCHO and C2H4, along with propylene (CH3CHCH2) and water are observed for 1,3-PG. Identical TPD line shapes and desorption yields for HCHO and C2H4 suggest that these products result from C-C bond cleavage and are coupled. At higher 1,3-PG coverages (> 0.1 ML), propanal (CH3CH2CHO) and two additional products, 1-propanol (CH3CH2CH2OH) and acrolein (CH2CHCHO), are observed. The desorption of 1-propanol is found to be coupled with the desorption of acrolein, suggesting that these products are formed by the disproportionation of two 1,3-PG molecules. The coverage dependent TPD results further show that propylene formation dominates at low coverages (< 0.3 ML), while the decomposition and disproportionation channels increase rapidly at higher coverages and reach yields comparable to that of propylene at the 1,3-PG saturation coverage of 0.5 ML. The observed surface chemistry clearly shows how the molecular structure of glycols influences their reaction pathways on oxide surfaces.

Chen, Long; Li, Zhenjun; Smith, R. Scott; Kay, Bruce D.; Dohnalek, Zdenek

2014-10-09T23:59:59.000Z

210

Anti-tumor effect and immuno-toxicity of target-specific drug delivery system: Doxorubicin-encapsulated nano particle  

Science Journals Connector (OSTI)

...Abstract #788: Long-term exposure to Nano-TiO2 promotes genomic instability and...Denver, CO Titanium dioxide (TiO2) nano-particles (100 nm in diameter) have...However, recent studies have shown that TiO2 nano-particles (nano-TiO2) induce cytotoxicity...

Hyunah Lee; Eui Jin Kim; Jeong-Jun Yu; Soo-Won Shu; Young Hyeh Ko; Jinny Park; Keun Chil Park; Hong Ghi Lee

2004-04-01T23:59:59.000Z

211

Sealing glasses for titanium and titanium alloys  

DOE Patents [OSTI]

Glass compositions containing CaO, Al/sub 2/O/sub 3/, B/sub 2/O/sub 3/, SrO and BaO of various combinations of mole % are provided. These compositions are capable of forming stable glass-to-metal seals with titanium and titanium alloys, for use in components such as seals for battery headers.

Brow, R.K.; Watkins, R.D.

1988-01-21T23:59:59.000Z

212

Sealing glasses for titanium and titanium alloys  

DOE Patents [OSTI]

Glass compositions containing CaO, Al.sub.2 O.sub.3, B.sub.2 O.sub.3, SrO and BaO of various combinations of mole % are provided. These compositions are capable of forming stable glass-to-metal seals with titanium and titanium alloys, for use in components such as seals for battery headers.

Brow, Richard K. (Albuquerque, NM); Watkins, Randall D. (Albuquerque, NM)

1992-01-01T23:59:59.000Z

213

Rare earth doped TiO2-CdS and TiO2-CdS composites with improvement of photocatalytic hydrogen evolution under visible light irradiation  

Science Journals Connector (OSTI)

In this paper, we report the obtention of a series of rare earth doped composite Pt/RE/TiO2-CdS (RE=La3+, Eu3+, Er3+, Gd3+) and TiO2-CdS photocatalysts prepared by a simple mechanical mixed method. The photocatalysts properties were studied by means of ultraviolet-visible spectroscopy, photoluminiscence spectra, X-ray diffraction, transmission electron microscopy, specific surface areas and the electrochemistry method. Photocatalytic hydrogen evolution using Na2S/Na2SO3 as electron donor was investigated under visible-light (??420 nm) irradiation. The rare earth doping enhances the activities of Pt/RE/TiO2-CdS samples (with 1.0 wt% deposited Pt). Under optimum conditions, the activities of La3+, Eu3+, Er3+, Gd3+ doped composite Pt/RE/TiO2-CdS increase by 62.0%, 40.4%, 34.7% and 30.0% respectively, when compared to that of Pt/TiO2-CdS, due to the prevention of electron–hole recombination and the flat-band potential of the conduction of TiO2 shifting negatively by the doping.

Shaoqin Peng; Yahui Huang; Yuexiang Li

2013-01-01T23:59:59.000Z

214

TiO2 Nanotubes/MWCNTs Nanocomposite Photocatalysts: Synthesis, Characterization and Photocatalytic Hydrogen Evolution Under UV-Vis Light Illumination  

SciTech Connect (OSTI)

Nanocomposite of TiO2 nanotubes (TiO2NTs) and multiwalled carbon nanotubes (MWCNTs) has been synthesized by a hydrothermal method and firstly used in photocatalytic hydrogen production. The obtained TiO2 NTs/MWCNTs composites were characterized by X-ray diffraction, transmission electron microscopy, Raman spectrum and ultraviolet-visible diffuse reflectance spectroscopy. The experimental results revealed that the MWCNTs were decorated with well dispersed anatase TiO2 nanotubes with a diameter of 8-15 nm. A slight blue shift and weak symmetry was observed for the strongest Raman peak which resulted from strain gradients originating from interface integration between TiO2 nanotubes and MWCNTs. The photocatalytic activity of the as-prepared samples was evaluated by hydrogen evolution from water splitting using Na2S and Na2SO3 as sacrificial reagents under UV-vis light irradiation. Enhanced photocatalytic activity compared with P25 has been observed for the resulted samples. The nanocomposite with optimized MWCNTs content of 1% displayed a hydrogen production rate of 161 u mol/h/g. Good photocatalytic stability of the as-synthesized samples was observed as well.

Li, Hao-Peng; Zhang, Xiao-Yan; Cui, Xiao-Li; Lin, Yuehe

2012-03-01T23:59:59.000Z

215

Investigation on the delaminated-pillared structure of TiO2-PILC synthesized by TiCl4 hydrolysis method  

Science Journals Connector (OSTI)

TiO2-PILCs were synthesized by the reaction between montmorillonite and acidic solutions of hydrolyzed TiCl4. Unlike commonly reported microporous pillared structure, a meso–microporous delaminated structure containing pillared fragments was observed in the resulting TiO2-PILC, based on the combined analyses of powder X-ray diffraction (XRD), nitrogen adsorption–desorption isotherms, chemical analysis, thermogravimetric (TG) and differential scanning calorimetry (DSC) analyses. Air-drying after ethanol extraction (EAD) is shown to be more effective than air-drying (AD) in preserving the delaminated structure in the resultant Ti-clay. A broad XRD peak at low 2? angle with a high d-spacing of ?6.6 nm was firstly reported and it was proposed to be correlated with the mesoporous delaminated structure rather than the (0 0 1) reflection of intercalated/pillared periodic structure. The resulting TiO2-PILC exhibits a good thermal stability as indicated by its surface area after calcination at 600 °C. Moreover, calcination above 300 °C results in the formation of nanocrystalline anatase in the TiO2-PILC, and the grain size of anatase increases with the increment of calcination temperature. However, no phase transformation from anatase to rutile was observed even under calcination at 1000 °C. These fundamental results provide new insights about the structure of TiO2-PILC synthesized by TiCl4 hydrolysis method.

Peng Yuan; Xiaoling Yin; Hongping He; Dan Yang; Linjiang Wang; Jianxi Zhu

2006-01-01T23:59:59.000Z

216

Off-normal CO2 desorption from the photooxidation of CO on reduced TiO2(110)  

SciTech Connect (OSTI)

Photo-induced reactions between O2 and CO on reduced rutile TiO2(110) are studied at low temperature (~30K). Photon stimulated desorption (PSD) of O2, CO2 and CO are observed with comparable yields. Isotope labeling experiments indicate that O2 chemisorbed in a vacancy is more active for photooxidation than O2 chemisorbed on a Ti5c site. The angular distribution for the desorbing CO2 is peaked at ~40º with respect to the surface normal in the azimuth (i.e. perpendicular to the bridging oxygen rows) suggesting that CO2 is produced from O2 occupying an oxygen vacancy and CO adsorbed on a Ti5c site next to it. The experimental results are consistent with CO2 being produced from a transition state complex that has been predicted theoretically. The CO PSD from TiO2(110) is enhanced dramatically by the presence of chemisorbed O2 suggesting that it is a by-product of the CO photooxidation process.

Petrik, Nikolay G.; Kimmel, Gregory A.

2010-09-02T23:59:59.000Z

217

Removal of pharmaceutical and personal care products (PPCPs) pollutants from water by novel TiO2–Coconut Shell Powder (TCNSP) composite  

Science Journals Connector (OSTI)

Abstract Photocatlytic removal of three pharmaceutical and personal care products pollutants using novel TiO2–Coconut Shell Powder (TCNSP) composite was investigated. The photocatalytic degradation rate of \\{PPCPs\\} generally increased with increasing light intensity and dissolved oxygen concentration. The degradation rate decreased with increasing initial concentration of PPCPs. The \\{PPCPs\\} concentration decreased substantially under irradiation of UVC when used in conjunction with the TCNSP composite. A number of composite/radiation types and intensities were tested. The concentration rate decrease trend was as: UVC/TCNSP > UVA/TCNSP > UVC > UVA. Under the UVC/TCNP combination, 99% removal was achieved compared to 30% for TiO2.

Majeda Khraisheh; Jongkyu Kim; Luiza Campos; Ala’a H. Al-Muhtaseb; Alaa Al-Hawari; Mohammad Al Ghouti; Gavin M. Walker

2014-01-01T23:59:59.000Z

218

Fe/TiO2/pH Interactions in Solar Degradation of Imidacloprid with TiO2/SiO2 Photocatalysts at Pilot-Plant Scale  

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The aqueous suspension flows through the system driven by a recirculation pump connected to a reservoir, the irradiated volume inside the solar collectors being 22 L. A schematic representation of the experimental setup can be found in Kositzi et al.. ... e-?+?h+???heat ... On the other hand, the minimum observed in dependence of the initial reaction rate on the titanium dioxide concentration suggests the existence of a compromise between two opposite effects:? a beneficial effect due to the semiconductor-assisted photocatalytic degradation and a detrimental effect on the homogeneous photo-Fenton degradation produced by competition with iron ions for photons. ...

Javier Marugán; María-José López-Muñoz; Wolfgang Gernjak; Sixto Malato

2006-11-11T23:59:59.000Z

219

Electronic Structure of TiO2/CH3NH3PbI3 Perovskite Solar Cell Interfaces  

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The last two decades, the research on different types of mesoscopic solar cells has grown enormously, largely because this family of solar cells can be controlled in many different ways and for their easy production. ... Recently, the use of soluble semiconductors such as organic–inorganic perovskites has shown great promise as light absorbers in solid-state mesoscopic solar cells. ... We report for the first time on a hole conductor-free mesoscopic methylammonium lead iodide (CH3NH3PbI3) perovskite/TiO2 heterojunction solar cell, produced by deposition of perovskite nanoparticles from a soln. of CH3NH3I and PbI2 in ?-butyrolactone on a 400 nm thick film of TiO2 (anatase) nanosheets exposing (001) facets. ...

Rebecka Lindblad; Dongqin Bi; Byung-wook Park; Johan Oscarsson; Mihaela Gorgoi; Hans Siegbahn; Michael Odelius; Erik M. J. Johansson; Håkan Rensmo

2014-01-24T23:59:59.000Z

220

Magnetic Fe3O4@TiO2 Nanoparticles-based Test Strip Immunosensing Device for Rapid Detection of Phosphorylated Butyrylcholinesterase  

SciTech Connect (OSTI)

An integrated magnetic nanoparticles-based test-strip immunosensing device was developed for rapid and sensitive quantification of phosphorylated butyrylcholinesterase (BChE), the biomarker of exposure to organophosphous pesticides (OP), in human plasma. In order to overcome the difficulty in scarce availability of OP-specific antibody, here magnetic Fe3O4@TiO2 nanoparticles were used and adsorbed on the test strip through a small magnet inserted in the device to capture target OP-BChE through selective binding between TiO2 and OP moiety. Further recognition was completed by horseradish peroxidase (HRP) and anti-BChE antibody (Ab) co-immobilized gold nanoparticles (GNPs). Their strong affinities among Fe3O4@TiO2, OP-BChE and HRP/Ab-GNPs were characterized by quartz crystal microbalance (QCM), surface plasmon resonance (SPR) and square wave voltammetry (SWV) measurements. After cutting off from test strip, the resulted immunocomplex (HRP/Ab-GNPs/OP-BChE/Fe3O4@TiO2) was measured by SWV using a screen printed electrode under the test zone. Greatly enhanced sensitivity was achieved by introduction of GNPs to link enzyme and antibody at high ratio, which amplifies electrocatalytic signal significantly. Moreover, the use of test strip for fast immunoreactions reduces analytical time remarkably. Coupling with a portable electrochemical detector, the integrated device with advanced nanotechnology displays great promise for sensitive, rapid and in-filed on-site evaluation of OP poisoning.

Ge, Xiaoxiao; Zhang, Weiying; Lin, Yuehe; Du, Dan

2013-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Dependence of Band Offset and Open-Circuit Voltage on the Interfacial Interaction between TiO2 and Carboxylated Polythiophenes  

E-Print Network [OSTI]

the open-circuit voltage. An attractive approach for making low-cost photovoltaic (PV) cells is to use bulk, 2005 The interface of planar TiO2/polymer photovoltaic cells was modified with two carboxylated to titania surfaces in photovoltaic cells. If the density of attachment groups is just enough to attach

McGehee, Michael

222

Plasma-Assisted Synthesis of TiO2 Nanorods by Gliding Arc Discharge Processing at Atmospheric Pressure for Photocatalytic Applications  

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The present study explores a new method of synthesis of TiO2 nano-particles in an aqueous medium from TiCl3 precursor by non-thermal plasma in humid air as feeding gas obtained at atmospheric pressure. The precur...

E. Acayanka; A. Tiya Djowe; S. Laminsi…

2013-08-01T23:59:59.000Z

223

Photocatalytic property of Fe3O4/SiO2/TiO2 core-shell nanoparticle with different functional layer thicknesses  

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This study examined the different properties of Fe3O4/SiO2/TiO2 (FST) core-shell nanoparticles encapsulated for one to five different times, represented as FST1 to FST5, respectively. These FST nanoparticles ...

Junyang Li, Libo Gao, Qiang Zhang, Ruiting Feng, Hongyan Xu, Jie Wang, Dong Sun, Chenyang Xue

2014-01-01T23:59:59.000Z

224

Heat transfer and friction factor of water based TiO2 and SiO2 nanofluids under turbulent flow in a tube  

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Abstract The heat transfer coefficient and friction factor of TiO2 and SiO2 water based nanofluids flowing in a circular tube under turbulent flow are investigated experimentally under constant heat flux boundary condition. TiO2 and SiO2 nanofluids with an average particle size of 50 nm and 22 nm respectively are used in the working fluid for volume concentrations up to 3.0%. Experiments are conducted at a bulk temperature of 30 °C in the turbulent Reynolds number range of 5000 to 25,000. The enhancements in viscosity and thermal conductivity of TiO2 are greater than SiO2 nanofluid. However, a maximum enhancement of 26% in heat transfer coefficients is obtained with TiO2 nanofluid at 1.0% concentration, while SiO2 nanofluid gave 33% enhancement at 3.0% concentration. The heat transfer coefficients are lower at all other concentrations. The particle concentration at which the nanofluids give maximum heat transfer has been determined and validated with property enhancement ratio. It is observed that the pressure drop is directly proportional to the density of the nanoparticle.

W.H. Azmi; K.V. Sharma; P.K. Sarma; Rizalman Mamat; G. Najafi

2014-01-01T23:59:59.000Z

225

Efficient Solar Energy Storage Using A TiO2/WO3 Tandem Photoelectrode in An All-vanadium Photoelectrochemical Cell  

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Abstract Using a photoelectrochemical (PEC) cell to convert solar energy to either electricity or chemical fuels has attracted much attention in the last four decades. However, two major obstacles that hinder wide-spread application of this approach lie in the relatively wide bandgap of chemically stable semiconducotrs, e.g., TiO2, and the rapid recombination of photogenerated charge carriers once they are generated within the semiconductors. We reported herein a method that utilized vanadium redox pairs, which are commonly used in vanadium redox-flow batteries (VRB), to mitigate charge carrier recombination and thus to improve photoresponse in regenerative solar energy storage for the first time. The results showed significant improvement in photocurrent during photo-charging of the all-vanadium PEC storage cell with the addition of a very low morlarity of vanadium redox species (0.01 M) to the acid electrolytes. Additonally, the photocurrent was almost doubled even with a TiO2 electrode when two vanadium redox species were used in a full-cell configuration instead of a half-cell setup. To further enhance the light absorption, a TiO2/WO3 tandem electrode was studied and compared to the TiO2 electrode in various vanadium redox electrolytes. The tandem electrode showed higher photoresponse in all electrolytes investigated. Furthermore, the important role of vanadium redox species and WO3 have been discussed.

Dong Liu; Zi Wei; Chia-jen Hsu; Yi Shen; Fuqiang Liu

2014-01-01T23:59:59.000Z

226

Photo-Degradation of Methelyne Blue over V2O5–TiO2 Nano-Porous Layers Synthesized by Micro Arc Oxidation  

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V2O5–TiO2 porous layers were synthesized via micro-arc oxidation for the first time. The effect of...k = 0.0228 min?1. The band gap energies of the vanadia–titania and pure titania layers were calculated as 2.56 ...

M. R. Bayati; F. Golestani-Fard; A. Z. Moshfegh

2010-01-01T23:59:59.000Z

227

A novel magnetically separable TiO2/CoFe2O4 nanofiber with high photocatalytic activity under UVvis light  

E-Print Network [OSTI]

, cost effectiveness and non-toxicity, and it efficiently converts abundant solar energy into effective photocatalysis has emerged as an alternative economical and harmless technology for removal of toxic organic chemical energy [2­4]. Much progress on the synthesis of nanostructured TiO2 has been made. To enhance its

Gong, Jian Ru

228

TiO2 nanoparticles for Li-ion battery anodes: Mitigation of growth and irreversible capacity using LiOH and NaOH  

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TiO2 anatase and rutile nanoparticles with various sizes and morphologies have been synthesized by very facile and scalable methods. A post-treatment including addition of LiOH or NaOH to the particles followed by heating at 180°C in air or autoclave ...

Martin Søndergaard; Yanbin Shen; Aref Mamakhel; Mario Marinaro; Margret Wohlfahrt-Mehrens; Karen Wonsyld; Søren Dahl; Bo B. Iversen

2014-12-04T23:59:59.000Z

229

Efficient Photoinduced Charge Injection from Chemical Bath Deposited CdS into Mesoporous TiO2 Probed with Time-Resolved Microwave Conductivity  

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We use the contactless time-resolved microwave conductivity (TRMC) technique to investigate the photoconductance of CdS-coated mesoporous TiO2 and ZrO2. The CdS domains were grown directly on the surface of the oxide by a chemical bath deposition method. ...

Jorge Piris; Andrew J. Ferguson; Jeff L. Blackburn; Andrew G. Norman; Garry Rumbles; Don C. Selmarten; Nikos Kopidakis

2008-04-24T23:59:59.000Z

230

An Unconventional Route to High-Efficiency Dye-Sensitized Solar Cells via Embedding Graphitic Thin Films into TiO2 Nanoparticle  

E-Print Network [OSTI]

and impedance spectroscopy. KEYWORDS: Carbon/TiO2 thin film, dye-sensitized solar cells, block copolymer-treated single-wall carbon nanotubes (a-SWCNs) in TiO2 film.37 The a-SWCNs modified solar cell indicated a 25An Unconventional Route to High-Efficiency Dye-Sensitized Solar Cells via Embedding Graphitic Thin

Lin, Zhiqun

231

Growth of two-dimensional ultrathin anatase TiO2 nanoplatelets on graphene for high-performance lithium-ion battery  

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Ultrathin 2-D anatase TiO2...nanoplatelets with a size of 15 nm and a thickness of only about 2 nm can be directly grown on the surface of graphene oxide support via a new facile one- ... , while the latter is si...

Yaodong Shen; Jun Song Chen; Jixin Zhu; Qingyu Yan…

2013-09-01T23:59:59.000Z

232

Enhanced photodegradation of pentachlorophenol in a soil washing system under solar irradiation with TiO2 nanorods combined with municipal sewage sludge  

Science Journals Connector (OSTI)

Abstract A novel remediation method for soil contaminated with hydrophobic chlorinated aromatic pollutants (HCAPs) was developed using TiO2 nanorods combined with municipal sewage sludge in surfactant solution. The target contaminant washed into surfactant solution from polluted soil can be rapidly removed under natural sunlight irradiation. The photocatalyst synthesized by TiO2 combined with municipal sewage sludge by a hydrothermal process shows excellent ability in this situation. The TiO2 nanorods appear on the surface of municipal sewage sludge, which offers a new way of solving waste municipal sewage sludge disposal problem and of producing high-activity photocatalyst. The nanocomposite was characterized by SEM, X-ray diffraction, and UV–Vis DRS. Results showed that the new nanocomposite was better than the original TiO2 catalyst. Using the proposed method in this study, the target contaminant can be removed by up to 97% after 30 min of irradiation in natural sunlight, whereas the surfactant loss was only 27%.

Zeyu Zhou; Yaxin Zhang; Hongtao Wang; Tan Chen; Wenjing Lu

2015-01-01T23:59:59.000Z

233

Laser cladding Al-Si/Al2O3-TiO2 composite coatings on AZ31B magnesium alloy  

Science Journals Connector (OSTI)

To improve the wear resistance and corrosion resistance of magnesium alloys, a 5 kW continuous wave CO2 laser was used to investigate the laser surface cladding on AZ31B magnesium alloys with Al-Si/...2O3 -TiO2.....

Zeqin Cui ???; Hongwei Yang…

2012-12-01T23:59:59.000Z

234

Rapid Charge Transport in Dye-Sensitized Solar Cells Made from Vertically Aligned Single-Crystal Rutile TiO2 Nanowires  

SciTech Connect (OSTI)

A rapid solvothermal approach was used to synthesize aligned 1D single-crystal rutile TiO2 nanowire (NW) arrays on transparent conducting substrates as electrodes for dye-sensitized solar cells. The NW arrays showed a more than 200 times faster charge transport (see picture) and a factor four lower defect state density than conventional rutile nanoparticle films.

Feng, X.; Zhu, K.; Frank, A. J.; Grimes, C. A.; Mallouk, T. E.

2012-03-12T23:59:59.000Z

235

Morphology change of oxygen-restructured TiO2,,110... surfaces by UHV annealing: Formation of a low-temperature ,,12... structure  

E-Print Network [OSTI]

Morphology change of oxygen-restructured TiO2,,110... surfaces by UHV annealing: Formation of a low microscopy images of the strands are consistent with the added- Ti2O3-row model. UHV annealing of oxygen. Restructured surfaces are annealed in ul- trahigh vacuum UHV at temperatures between 620 and 830 K. The surface

Diebold, Ulrike

236

An Integrated Power Pack of Dye-Sensitized Solar Cell and Li Battery Based on Double-Sided TiO2 Nanotube Arrays  

E-Print Network [OSTI]

is based on a silicon solar panel and a solid-state lithium battery as the two independent parts, whichAn Integrated Power Pack of Dye-Sensitized Solar Cell and Li Battery Based on Double-Sided TiO2 harvest and storage processes. This power pack incorporates a series-wound dye- sensitized solar cell

Wang, Zhong L.

237

Site-Specific Imaging of Elemental Steps in Dehydration of Diols on TiO2(110)  

SciTech Connect (OSTI)

The conversion of diols on partially reduced TiO2(110) at low coverage was studied using variable-temperature scanning tunneling microscopy, temperature programmed desorption and density functional theory calculations. We find, that below ~230 K, ethane-1,2-diol and propane-1,3-diol molecules adsorb predominantly on five-fold coordinated Ti5c atoms. The dynamic equilibrium between molecularly bound and dissociated species resulting from O-H bond scission and reformation is observed. As the diols start to diffuse on the Ti5c rows above ~230 K, they dissociate irreversibly upon encountering bridging oxygen (Ob) vacancy (VO’s) defects. Two dissociation pathways, one via O-H and the other via C-O bond scission leading to identical surface intermediates, hydroxyalkoxy, Ob-(CH2)n-OH (n = 2, 3) and bridging hydroxyl, HOb, are seen. For O-H bond scission, the Ob-(CH2)n-OH is found on the position of the original VO, while for C-O scission it is found on the adjacent Ob site. Theoretical calculations suggest that the observed mixture of C-O/O-H bond breaking processes are a result of the steric factors enforced upon the diols by the second OH group that is bound to a Ti5c site. At room temperature, rich dissociation/reformation dynamics of the second, Ti5c-bound O-H leads to the formation of dioxo, Ob-(CH2)n-OTi, species. Above ~400 K, both Ob-(CH2)n-OH and Ob-(CH2)n-OTi species convert into a new intermediate, that is centered on Ob row. Combined experimental and theoretical evidence shows that this intermediate is most likely a new dioxo, Ob-(CH2)2-Ob, species. Further annealing leads to sequential C-Ob bond cleavage and alkene desorption above ~ 500 K. Simulations find that the sequential C-O bond breaking process follows a homolytic diradical pathway with the first C-O bond breaking event accompanied by a non-adiabatic electron transfer within the TiO2(110) substrate.

Acharya, Danda P.; Yoon, Yeohoon; Li, Zhenjun; Zhang, Zhenrong; Lin, Xiao; Mu, Rentao; Chen, Long; Kay, Bruce D.; Rousseau, Roger J.; Dohnalek, Zdenek

2013-11-26T23:59:59.000Z

238

Comparison of the Photodesorption Activities of cis-Butene, trans-Butene and Isobutene on the Rutile TiO2(110) Surface  

SciTech Connect (OSTI)

The chemical and photochemical properties of three butene molecules (cis-butene, trans-butene and isobutene) were explored on the clean rutile TiO2(110) surface using temperature programmed desorption (TPD) and photon simulated desorption (PSD). At the low coverage limit, trans-butene was the most strongly bound butene on the TiO2(110) surface, desorbing at ~ 210 K, however increased intermolecular repulsions between trans-butene molecules at higher coverage diminished its binding. Both cis-butene and isobutene saturated the first layer on TiO2(110) at a coverage of ~0.50 ML in a single TPD feature at 184 and 192 K, respectively. In contrast, the maximum coverage that trans-butene could achieve in its 210 K peak was ~1/3 ML, with higher coverages resulting a low temperature desorption at ~137 K. Coverages of these molecules above 0.50 ML resulted in population of second layer and multilayer states. The instability of trans-butene at a coverage of 0.5 ML on the surface was linked to the inversion center in its symmetry. In the absence of coadsorbed oxygen, the primary photochemical pathway of each butene molecule on TiO2(110) was photodesorption. The photoactivities of these molecules on TiO2(110) at an initial coverage of 0.50 ML followed the trend: isobutene > cis-butene > trans-butene. In contrast, the photoactivities of low coverages of cis-butene and trans-butene exceeded those measured at 0.50 ML. These data suggest that intermolecular interactions (repulsions) play a significant role in diminishing the photoactivities of weakly bound molecules on TiO2 photocatalysts. Work reported here was supported by the U.S. Department of Energy, Office of Basic Energy Science, Division of Chemical Sciences, Geosciences, and Biosciences, and performed in the Williams R. Wiley Environmental Molecular Science Laboratory (EMSL), a Department of Energy user facility funded by the Office of Biological and Environmental Research. Pacific Northwest National Laboratory is a multiprogram national laboratory operated for the U.S. Department of Energy by the Battelle Memorial Institute under contract DEAC05-76RL01830.

Henderson, Michael A.

2013-11-14T23:59:59.000Z

239

Electrochimica Acta 46 (2001) 33513358 Transference number measurements of TiO2 BaO melts by  

E-Print Network [OSTI]

variations in ion density and variations in net free-charge density. 2. Background By direct comparison joule heating of the electrolyte is central to establishing the thermal balance of the reactor. Molten processes [1]. In particular, Sadoway has spec- ulated on the utility of producing titanium metal by direct

Sadoway, Donald Robert

240

Magnetic properties of epitaxial Co-doped anatase TiO2 thin films with excellent structural quality  

SciTech Connect (OSTI)

The heteroepitaxy of Co-doped anatase TiO2 on LaAlO3(001) has been refined with the goal of determining the relationship between structural quality and magnetic ordering. By significantly reducing the deposition rate and substrate temperature, well-ordered Co:TiO2 films with unprecedented crystalline quality were obtained by oxygen-plasma-assisted molecular beam epitaxy, as characterized by x-ray diffraction. These films exhibit uniform Co doping, with no evidence of Co segregation or secondary phases throughout the film depth or on the surface. Despite the improvement in crystalline quality and Co distribution, the films exhibit negligible ferromagnetism, with saturation moments of only ~0.1 ?B/Co. This loss of ferromagnetism is in stark contrast to faster-grown Co:TiO2 films, where a higher growth rate and substrate temperature typically result in lower crystalline quality, a highly non-uniform Co distribution, and average saturation moments of ~1.2 ?B/Co. The presence of ferromagnetism in faster-grown Co:TiO2 does not appear to arise from intrinsic point defects present in the bulk material, such as charge-compensating oxygen vacancies, but is instead attributed to the presence of extended structural defects.

Kaspar, Tiffany C.; Droubay, Timothy C.; McCready, David E.; Nachimuthu, Ponnusamy; Heald, Steve M.; Wang, Chong M.; Lea, Alan S.; Shutthanandan, V.; Chambers, Scott A.; Toney, Michael F.

2006-07-26T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

First-Principles Calculations of the Pressure Stability and Elasticity of Dense TiO2 Phases Using the B3LYP Hybrid Functional  

Science Journals Connector (OSTI)

First-Principles Calculations of the Pressure Stability and Elasticity of Dense TiO2 Phases Using the B3LYP Hybrid Functional ... (41) The reciprocal space integration was carried out by sampling the Brillouin zone using an 8 × 8 × 8 Monkhorst–Pack grid. ... Computations were carried out at the National Computational Infrastructure – National Facility of Australia (http://nf.nci.org.au/). ...

Varghese Swamy; Nicholas C. Wilson

2014-04-07T23:59:59.000Z

242

Investigation of the Electric Field in TiO2/FTO Junctions Used in Dye-Sensitized Solar Cells by Photocurrent Transients  

Science Journals Connector (OSTI)

Investigation of the Electric Field in TiO2/FTO Junctions Used in Dye-Sensitized Solar Cells by Photocurrent Transients ... The input resistance of the scope was 50 ? (dc mode), and each transient was averaged 10 times (repetition rate, 1 Hz) to get a stabilized signal. ... The elementary charge is denoted as q, n, and p are the electron and hole densities, while the respective mobilities are given by ?n and ?p. ...

Sven Rühle; Thomas Dittrich

2005-04-22T23:59:59.000Z

243

Synthesis, characterization and photocatalytic properties of iron-doped titania semiconductors prepared from TiO2 and iron(III) acetylacetonate  

Science Journals Connector (OSTI)

Specimens of iron-doped titania containing different amounts of Fe (0.5–5%) were prepared from TiO2 (Degussa P-25) and Fe(III) acetylacetonate by the wet impregnation method. Samples were characterized by X-ray diffraction analysis, specific surface area (BET) measurements, SEM-EDX, atomic absorption and IR and diffuse reflectance spectra. From the structural point of view, the samples were similar to those obtained with Fe(NO3)3 · 9H2O as the precursor, but with a more homogeneous distribution of iron for each mixed oxide sample on the particle surfaces but not between particles. The photocatalytic activity of these samples under near-UV irradiation was better for oxalic acid degradation than for EDTA, and similar for both types of mixed oxide samples. Mixed oxides showed however lower activity than TiO2. Some photodegradation under visible irradiation, not occurring with TiO2, could be observed for oxalic acid when using 5% Fe-containing samples.

JoséA. Navío; Gerardo Colón; Marta I. Litter; Gladi N. Bianco

1996-01-01T23:59:59.000Z

244

Exergy analysis of hydrocarbons mixture refrigerants R436A and R436B as a drop in replacement for R134a with TiO2 nanoparticles  

Science Journals Connector (OSTI)

The refrigerator exergy efficiency (EE) with nanoparticles in the working fluid was investigated experimentally. Mineral oil (MO) with TiO2 nanoparticles mixtures were used as the lubricant instead of Polyol ester (POE) oil in the R134a, R436A (R290/R600a-56/44-weight %) and R436B (R290/R600a-52/48-weight %) refrigerator. The results indicate that R134a, R436A and R436B and MO with TiO2 nanoparticles work normally and safely in the refrigerator. The refrigerator EE (34.1, 40.1 and 41.6%) was better than the R134a, R436A and R436B and POE oil system (23.4, 35.3 and 37.7%). The same tests with Al2O3 nanoparticles showed that the different nanoparticles properties have little effect on the refrigerator EE. Thus, TiO2 nanoparticles can be used in refrigerator to considerably increase the EE.

Venkataramana Murthy V. Padmanabhan; Senthil Kumar Palanisamy

2013-01-01T23:59:59.000Z

245

Au/Pt Nanoparticle-Decorated TiO2 Nanofibers with Plasmon-Enhanced Photocatalytic Activities for Solar-to-Fuel Conversion  

Science Journals Connector (OSTI)

Our studies demonstrate that through rational design of composite nanostructures one can harvest visible light through the SPR effect to enhance the photocatalytic activities of semiconductors initiated by UV-light to more effectively utilize the whole solar spectrum for energy conversion. ... (4-7) Nevertheless, the applications of pure TiO2 for solar fuel production are often restricted by several main disadvantages: (1) due to the wide band gap (Eg: ?3.2 eV), TiO2 can only absorb UV light which accounts for only ?4% of the solar irradiation;(6, 8, 9) (2) rapid recombination of photogenerated charge carriers leads to low quantum yield of TiO2;(10) and (3) large overpotential for hydrogen (H2) production and CO2 reduction. ... (18, 20, 35, 36) Thus, to achieve high efficiency for photocatalytic H2 production, the coloading of Pt NPs into Au/TiO2 composite structures would be desirable by combining the advantages of both SPR effect of Au NPs and activation effect of Pt NPs for HER. ...

Zhenyi Zhang; Zheng Wang; Shao-Wen Cao; Can Xue

2013-11-13T23:59:59.000Z

246

Dust in brown dwarfs and extra-solar planets IV. Assessing TiO2 and SiO nucleation for cloud formation modeling  

E-Print Network [OSTI]

Clouds form in atmospheres of brown dwarfs and planets. The cloud particle formation processes are similar to the dust formation process studied in circumstellar shells of AGB stars and in Supernovae. Cloud formation modelling in substellar objects requires gravitational settling and element replenishment in addition to element depletion. All processes depend on the local conditions, and a simultaneous treatment is required. We apply new material data in order to assess our cloud formation model results regarding the treatment of the formation of condensation seeds. We re-address the question of the primary nucleation species in view of new (TiO2)_N-cluster data and new SiO vapour pressure data. We apply the density functional theory using the computational chemistry package Gaussian 09 to derive updated thermodynamical data for (TiO2)_N-clusters as input for our TiO2 seed formation model. We test different nucleation treatments and their effect on the overall cloud structure by solving a system of dust momen...

Lee, G; Giles, H; Bromley, S T

2014-01-01T23:59:59.000Z

247

Impact of Solvent on Photocatalytic Mechanisms: Reactions of Photodesorption Products with Ice Overlayers on the TiO2(110) Surface  

SciTech Connect (OSTI)

The effects of water and methanol ice overlayers on the photodecomposition of acetone on rutile TiO2(110) were evaluated in ultrahigh vacuum (UHV) using photon stimulated desorption (PSD) and temperature programmed desorption (TPD). In the absence of ice overlayers, acetone photodecomposed on TiO2(110) at 95 K by ejection of a methyl radical into the gas phase and formation of acetate on the surface. With ice overlayers, the methyl radicals are trapped at the interface between TiO2(110) and the ice. When water ice was present, these trapped methyl radicals reacted either with each other to form ethane or with other molecules in the ice (e.g., water or displaced acetone) to form methane (CH4), ethane (CH3CH3) and other products (e.g., methanol), with all of these products trapped in the ice. The new products were free to revisit the surface or depart during desorption of the ice. When methanol ice was present, methane formation came about only from reaction of trapped methyl radicals with the methanol ice. Methane and ethane slowly leaked through methanol ice overlayers into vacuum at 95 K, but not through water ice overlayers. Different degrees of site competition between water and acetone, and between methanol and acetone led to different hydrogen abstraction pathways in the two ices. These results provide new insights into product formation routes and solution-phase radical formation mechanisms that are important in heterogeneous photocatalysis.

Shen, Mingmin; Henderson, Michael A.

2011-04-07T23:59:59.000Z

248

DOI: 10.1007/s00339-002-2004-5 Appl. Phys. A 76, 17 (2002)  

E-Print Network [OSTI]

- pects of TiO2 surfaces or interfaces would potentially have a positive impact. Titanium dioxide is used online: 2001 · © Springer-Verlag 2002 ABSTRACT Titanium oxides are used in a wide variety of tech initio approaches and to calculate properties of adsorption systems. Scanning tunneling microscopy (STM

Diebold, Ulrike

249

Surface Structure of TiO2011-2 1 T. J. Beck,1  

E-Print Network [OSTI]

.43.Bc, 68.47.Gh Titanium dioxide is a promising photocatalyst for the remediation of pollutants of metal oxides [9,10]. In bulk TiO2 the titanium atoms are surrounded by octahedra of six oxygen atoms of the model in Fig. 1.) Such undercoordinated Ti(5) atoms are preferred adsorption sites for a variety

Diebold, Ulrike

250

Nitrogen dioxide detection  

DOE Patents [OSTI]

Method and apparatus for detecting the presence of gaseous nitrogen dioxide and determining the amount of gas which is present. Though polystyrene is normally an insulator, it becomes electrically conductive in the presence of nitrogen dioxide. Conductance or resistance of a polystyrene sensing element is related to the concentration of nitrogen dioxide at the sensing element.

Sinha, Dipen N. (Los Alamos, NM); Agnew, Stephen F. (Los Alamos, NM); Christensen, William H. (Buena Park, CA)

1993-01-01T23:59:59.000Z

251

Physisorption of N2, O2, and CO on Fully Oxidized TiO2(110)  

SciTech Connect (OSTI)

Physisorption of N2, O2 and CO was studied on fully oxidized TiO2(110) using beam reflection and temperature programmed desorption (TPD) techniques. Sticking coefficients for all three molecules are nearly equal (0.75 ± 0.05) and approximately independent of coverage suggesting that adsorption occurs via a precursor mediated mechanism. Excluding multilayer coverages, the TPD spectra for all three adsorbates exhibit three distinct coverage regimes that can be interpreted in accord with previous theoretical studies of N2 adsorption. At low coverages (0 to 0.5 N2/Ti4+), N2 molecules bind head-on to five-coordinated Ti4+ ions. The adsorption occurs preferentially on the Ti4+ sites that do not have neighboring adsorbates. This arrangement minimizes the repulsive interactions between the adsorbed molecules along the Ti4+ rows resulting in a relatively small shift of the TPD peak (105 ? 90 K) with increasing coverage. At higher N2 coverages (0 to 1.0 N2/Ti4+) the nearest-neighbor Ti4+ sites become occupied. The close proximity of the adsorbates results in strong repulsion thus giving rise to a significant shift of the TPD leading edges (90 ? 45 K) with increasing coverage. For N2/Ti4+ > 1, an additional low temperature peak (~ 43 K) is present and is ascribed to N2 adsorption on bridge-bonded oxygen rows. The results for O2 and CO are qualitatively similar. The repulsive adsorbate-adsorbate interactions largest for CO, most likely due to aligned CO dipole moments. The coverage dependent binding energies of O2, N2, and CO are determined by inverting TPD profiles.

Dohnalek, Zdenek; Kim, Jooho; Bondarchuk, Oleksander A.; White, J. M.; Kay, Bruce D.

2006-03-30T23:59:59.000Z

252

An Insoluble Titanium-Lead Anode for Sulfate Electrolytes  

SciTech Connect (OSTI)

The project is devoted to the development of novel insoluble anodes for copper electrowinning and electrolytic manganese dioxide (EMD) production. The anodes are made of titanium-lead composite material produced by techniques of powder metallurgy, compaction of titanium powder, sintering and subsequent lead infiltration. The titanium-lead anode combines beneficial electrochemical behavior of a lead anode with high mechanical properties and corrosion resistance of a titanium anode. In the titanium-lead anode, the titanium stabilizes the lead, preventing it from spalling, and the lead sheathes the titanium, protecting it from passivation. Interconnections between manufacturing process, structure, composition and properties of the titanium-lead composite material were investigated. The material containing 20-30 vol.% of lead had optimal combination of mechanical and electrochemical properties. Optimal process parameters to manufacture the anodes were identified. Prototypes having optimized composition and structure were produced for testing in operating conditions of copper electrowinning and EMD production. Bench-scale, mini-pilot scale and pilot scale tests were performed. The test anodes were of both a plate design and a flow-through cylindrical design. The cylindrical anodes were composed of cylinders containing titanium inner rods and fitting over titanium-lead bushings. The cylindrical design allows the electrolyte to flow through the anode, which enhances diffusion of the electrolyte reactants. The cylindrical anodes demonstrate higher mass transport capabilities and increased electrical efficiency compared to the plate anodes. Copper electrowinning represents the primary target market for the titanium-lead anode. A full-size cylindrical anode performance in copper electrowinning conditions was monitored over a year. The test anode to cathode voltage was stable in the 1.8 to 2.0 volt range. Copper cathode morphology was very smooth and uniform. There was no measurable anode weight loss during this time period. Quantitative chemical analysis of the anode surface showed that the lead content after testing remained at its initial level. No lead dissolution or transfer from the anode to the product occurred.A key benefit of the titanium-lead anode design is that cobalt additions to copper electrolyte should be eliminated. Cobalt is added to the electrolyte to help stabilize the lead oxide surface of conventional lead anodes. The presence of the titanium intimately mixed with the lead should eliminate the need for cobalt stabilization of the lead surface. The anode should last twice as long as the conventional lead anode. Energy savings should be achieved due to minimizing and stabilizing the anode-cathode distance in the electrowinning cells. The anode is easily substitutable into existing tankhouses without a rectifier change.The copper electrowinning test data indicate that the titanium-lead anode is a good candidate for further testing as a possible replacement for a conventional lead anode. A key consideration is the cost. Titanium costs have increased. One of the ways to get the anode cost down is manufacturing the anodes with fewer cylinders. Additional prototypes having different number of cylinders were constructed for a long-term commercial testing in a circuit without cobalt. The objective of the testing is to evaluate the need for cobalt, investigate the effect of decreasing the number of cylinders on the anode performance, and to optimize further the anode design in order to meet the operating requirements, minimize the voltage, maximize the life of the anode, and to balance this against a reasonable cost for the anode. It is anticipated that after testing of the additional prototypes, a whole cell commercial test will be conducted to complete evaluation of the titanium-lead anode costs/benefits.

Ferdman, Alla

2005-05-11T23:59:59.000Z

253

Using Ionic Liquids to Make Titanium Dioxide Nanotubes - Energy...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Photovoltaic Solar Photovoltaic Hydrogen and Fuel Cell Hydrogen and Fuel Cell Energy Storage Energy Storage Find More Like This Return to Search Using Ionic Liquids to Make...

254

Formation of nanostructured TiO{sub 2} by femtosecond laser irradiation of titanium in O{sub 2}  

SciTech Connect (OSTI)

We used femtosecond laser irradiation of titanium metal in an oxidizing environment to form a highly stable surface layer of nanostructured amorphous titanium dioxide (TiO{sub 2}). We studied the influence of atmospheric composition on these surface structures and found that gas composition and pressure affect the chemical composition of the surface layer but not the surface morphology. Incorporation of nitrogen is only possible when no oxygen is present in the surrounding atmosphere.

Landis, Elizabeth C. [Department of Chemistry, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138 (United States); Phillips, Katherine C.; Mazur, Eric [School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138 (United States); Friend, Cynthia M. [Department of Chemistry, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138 (United States); School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138 (United States)

2012-09-15T23:59:59.000Z

255

Viscosity of tetrahydrothiophene-1,1-dioxide  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

256

Preparation of feedstocks from nano/submicron-sized TiO2 particles to obtain photocatalytic coatings by atmospheric plasma spraying  

Science Journals Connector (OSTI)

Abstract Atmospheric plasma spraying (APS) has been proved useful in obtaining TiO2 coatings with effective photocatalytic activity. However, the influence of feedstock characteristics on photocatalytic activity has hardly been addressed. This study was undertaken to prepare TiO2 photocatalytic coatings by APS from different feedstocks. The feedstocks were obtained by spray drying suspensions of a nano- and a submicron-sized TiO2 powder, with different solids contents and/or ratios of the nano- to submicron-sized particles. All the resulting powders were fully characterised to assess their suitability for use in APS processes. Feedstock powders were then deposited on steel coupons by APS using hydrogen or helium as secondary plasma gas. Coating microstructure and phase composition were characterised. Coating photocatalytic activity was determined by measuring the degradation of methylene blue dye in an aqueous solution. Powder characterisation showed that all feedstocks met plasma spray operation requirements with regard to agglomerate size distribution and density, as well as to powder flowability. Optimum agglomerate density was obtained when a well-balanced mixture of nano- and submicron-sized particles was used. All coatings displayed a bimodal microstructure with partially melted agglomerates that retained the initial nano- or submicron-sized structure and composition (anatase phase) of the feedstock, surrounded by a fully melted matrix mainly formed by rutile. As expected, coating porosity as well as the amount of partially melted areas depended strongly on plasma spray conditions and on feedstock characteristics. With regard to photocatalytic activity, a reasonably good fit of a first-order kinetic model to the experimental data was found for all coatings. The kinetic constants obtained displayed higher values than those of a commercial sol–gel coating. The values of these constants were related to feedstock characteristics as well as to plasma spraying conditions on the basis of anatase content. The contribution of other factors to the resulting coating surface is also discussed.

Mari Carmen Bordes; Mónica Vicent; Arnaldo Moreno; Verónica López; Rodrigo Moreno; Marí;a Dolores Salvador; Rut Benavente; Enrique Sánchez

2014-01-01T23:59:59.000Z

257

Excellent Passivation and Low Reflectivity Al2O3/TiO2 Bilayer Coatings for n-Wafer Silicon Solar Cells: Preprint  

SciTech Connect (OSTI)

A bilayer coating of Al2O3 and TiO2 is used to simultaneously achieve excellent passivation and low reflectivity on p-type silicon. This coating is targeted for achieving high efficiency n-wafer Si solar cells, where both passivation and anti-reflection (AR) are needed at the front-side p-type emitter. It could also be valuable for front-side passivation and AR of rear-emitter and interdigitated back contact p-wafer cells. We achieve high minority carrier lifetimes {approx}1 ms, as well as a nearly 2% decrease in absolute reflectivity, as compared to a standard silicon nitride AR coating.

Lee, B. G.; Skarp, J.; Malinen, V.; Li, S.; Choi, S.; Branz, H. M.

2012-06-01T23:59:59.000Z

258

Nanoclay Gelation Approach toward Improved Dye-Sensitized Solar Cell Efficiencies: An Investigation of Charge Transport and Shift in the TiO2 Conduction Band  

Science Journals Connector (OSTI)

Nanoclay Gelation Approach toward Improved Dye-Sensitized Solar Cell Efficiencies: An Investigation of Charge Transport and Shift in the TiO2 Conduction Band ... Nanoclay minerals play a promising role as additives in the liquid electrolyte to form a gel electrolyte for quasi-solid-state dye-sensitized solar cells, because of the high chemical stability, unique swelling capability, ion exchange capacity, and rheological properties of nanoclays. ... The nanoclays used in previous studies were mainly of smectite/montmorillonite type, which belong to the family of cationic clays (hydroxides layers with negative charge). ...

Xiu Wang; Sneha A. Kulkarni; Bruno Ieiri Ito; Sudip K. Batabyal; Kazuteru Nonomura; Chee Cheong Wong; Michael Grätzel; Subodh G. Mhaisalkar; Satoshi Uchida

2012-12-19T23:59:59.000Z

259

Preparation of Titanium Oxide Pillars on Glass Substrates and Ultrathin Titanium Oxide Layer using PMMA/PS Blend Films  

Science Journals Connector (OSTI)

The TiO2 pillars were both ?30 nm in height, about half of the desired value (?70 nm) to fabricate good interdigitated PV (photovolatic) devices. ...

Dan Liu; Pinyi Yang; Christine K. Luscombe

2008-04-30T23:59:59.000Z

260

Argonne CNM Highlight: Improved Hybrid Solar Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Improved Hybrid Solar Cells Improved Hybrid Solar Cells inorganic-organic hybrid photovoltaic (PV) cells imade of highly ordered titanium dioxide (TiO2) nanotube arrays filled with solid organic hole conductors such as conjugated polymers One approach for making inexpensive inorganic-organic hybrid photovoltaic (PV) cells is to fill highly ordered titanium dioxide (TiO2) nanotube arrays with solid organic hole conductors such as conjugated polymers. Center for Nanoscale Materials researchers and collaborative users from the University of Chicago present a new in situ ultraviolet (UV) polymerization method for growing polythiophene inside TiO2 nanotubes and compare this method to the conventional approach of infiltrating nanotubes with presynthesized polymer. A nanotubular TiO2 substrate is immersed in a 2,5-diiodothiophene (DIT)

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Synergistic Effect of Nano-TiO2 and Nanoclay on the Ultraviolet Degradation and Physical Properties of Wood Polymer Nanocomposites  

Science Journals Connector (OSTI)

(7) The combination of nanoclay with other metal nanoparticles will influence the properties of the composites considerably, as reported by Laachachia et al. while studying the properties of poly(methyl methacrylate) (PMMA) nanocomposites prepared with TiO2 and nanoclay. ... (30) Mina et al. studied the XRD pattern of a polypropylene/titanium dioxide composite and reported a similar increase in the peak intensity of TiO2 in the composites. ...

Ankita Hazarika; Tarun K. Maji

2013-08-26T23:59:59.000Z

262

It's Elemental - The Element Titanium  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Scandium Scandium Previous Element (Scandium) The Periodic Table of Elements Next Element (Vanadium) Vanadium The Element Titanium [Click for Isotope Data] 22 Ti Titanium 47.867 Atomic Number: 22 Atomic Weight: 47.867 Melting Point: 1941 K (1668°C or 3034°F) Boiling Point: 3560 K (3287°C or 5949°F) Density: 4.5 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 4 Group Number: 4 Group Name: none What's in a name? From the Greek word Titans, the mythological "first sons of the Earth." Say what? Titanium is pronounced as tie-TAY-nee-em. History and Uses: Titanium was discovered in 1791 by the Reverend William Gregor, an English pastor. Pure titanium was first produced by Matthew A. Hunter, an American metallurgist, in 1910. Titanium is the ninth most abundant element in the

263

In-situ imaging of the nucleation and growth of epitaxial anatase TiO2(001) films on SrTiO3(001)  

SciTech Connect (OSTI)

The growth of TiO2 anatase films on Nb doped SrTiO3(001) by oxygen-assisted molecular beam epitaxy has been studied in-situ by scanning tunneling microscopy. We show that the initial growth follows the Stranski-Krastanov mode, where islands form on top of a wetting layer consisting of two monolayers (ML) of TiO2. The epitaxial islands subsequently nucleate and coalescence into large commonly-oriented crystallites. The (4x4) reconstruction observed by reflection high-energy electron diffraction (RHEED) is shown to result from the coexistence of individual (4x1) and (1x4) reconstructions present on different crystallite surfaces. The anatase grows in units of bilayers, resulting in a step height of 2 ML (~0.5 nm). This result explains the fact that the measured period of the RHEED specular-beam intensity oscillations corresponds to the time required for deposition of 2 ML. Ar ion sputtering and UHV annealing results in a transformation to coexisting (4x1) and (1x4) reconstructed terraces on individual crystallites, as commonly observed by ex-situ STM studies.

Du, Yingge; Kim, Dong Jun; Kaspar, Tiffany C.; Chamberlin, Sara E.; Lyubinetsky, Igor; Chambers, Scott A.

2012-09-30T23:59:59.000Z

264

What's Next for Vanadium Dioxide?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

How Atomic Vibrations Transform Vanadium Dioxide How Atomic Vibrations Transform Vanadium Dioxide Calculations Confirm Material's Potential for Next-Generation Electronics, Energy...

265

Titanium for Offshore Oil Drilling  

Science Journals Connector (OSTI)

Current and future applications for titanium and its alloys for offshore drilling have been examined. Successful applications were shown ... chlorination systems. Future applications especially for deepwater drilling

Dennis F. Hasson; C. Robert Crowe

1982-01-01T23:59:59.000Z

266

Induction slag reduction process for making titanium  

DOE Patents [OSTI]

Continuous process for preparing titanium comprising fluorinating titanium ore, and reducing the formed alkaline earth fluotitanate with an alkaline earth metal in an induction slag reactor.

Traut, Davis E. (Corvallis, OR)

1991-01-01T23:59:59.000Z

267

MACHINING STABILITY OF WIRE EDM OF TITANIUM.  

E-Print Network [OSTI]

??This work presents an experimental investigation of wire electro-discharge machining (WEDM) of titanium alloy. The outstanding characteristics of titanium alloys such as their compatibility and… (more)

Nourbakhsh, Farnaz

2012-01-01T23:59:59.000Z

268

Selective reduction of nitric oxide with ammonia over vanadia on pillared titanium phosphate  

E-Print Network [OSTI]

in the catalyst. Shikada et al. (1981) compared AlzOz, SiOz, and SiO, ? TiOz (equimolar) supports for VzOs using a simulated flue gas containing 100 ppni SOz. The silica- titanium dioxide supported catalyst showed the highest NO conversions followed by those...SELECTIVE REDUCTION OF NITRIC OXIDE YVITH AMMONIA OVER VANADIA ON PILLARED TITANIUM PHOSPHATE A Thesis LAWRENCE JOSEPH CZARNECKI Submitted to the Graduate College of Texas AkM University in partial fulfillment of the requirement for the degree...

Czarnecki, Lawrence Joseph

1988-01-01T23:59:59.000Z

269

Platinum supported on titanium–ruthenium oxide is a remarkably stable electrocatayst for hydrogen fuel cell vehicles  

Science Journals Connector (OSTI)

...dioxide in the cathode exit stream during...exceptionally stable electrocatalyst that yields...PEM fuel cell cathodes during potential cycling...Ti0.7W0.3O2 electrocatalyst for proton-exchange...Popov BN ( 2009 ) Development of a titanium...oxide-supported platinum electrocatalyst for polymer electrolyte...

Javier Parrondo; Taehee Han; Ellazar Niangar; Chunmei Wang; Nilesh Dale; Kev Adjemian; Vijay Ramani

2014-01-01T23:59:59.000Z

270

Platinum supported on titanium–ruthenium oxide is a remarkably stable electrocatayst for hydrogen fuel cell vehicles  

Science Journals Connector (OSTI)

...carbon support in PEMFC at fuel starvation . ECS...Ti0.7W0.3O2 electrocatalyst for proton-exchange...Popov BN ( 2009 ) Development of a titanium dioxide-supported...oxide-supported platinum electrocatalyst for polymer electrolyte...Mallouk TE ( 2002 ) Development of supported bifunctional...

Javier Parrondo; Taehee Han; Ellazar Niangar; Chunmei Wang; Nilesh Dale; Kev Adjemian; Vijay Ramani

2014-01-01T23:59:59.000Z

271

Precision Cleaning Titanium Components  

SciTech Connect (OSTI)

Clean bond surfaces are critical to the operation of diffusion bonded titanium engine components. These components can be contaminated with machining coolant, shop dirt, and fingerprints during normal processing and handling. These contaminants must be removed to achieve acceptable bond quality. As environmental concerns become more important in manufacturing, elimination of the use of hazardous materials is desired. For this reason, another process (not using nitric-hydrofluoric acid solution) to clean titanium parts before bonding was sought. Initial cleaning trials were conducted at Honeywell to screen potential cleaning techniques and chemistries. During the initial cleaning process screening phase, Pratt and Whitney provided Honeywell with machined 3 inch x 3 inch x 1 inch titanium test blocks. These test blocks were machined with a water-based machining coolant and exposed to a normal shop environment and handling. (Honeywell sectioned one of these blocks into smaller samples to be used for additional cleanliness verification analyses.) The sample test blocks were ultrasonically cleaned in alkaline solutions and AUGER analysis was used by Honeywell FM and T to validate their cleanliness. This information enabled selection of final cleaning techniques and solutions to be used for the bonding trials. To validate Honeywell's AUGER data and to verify the cleaning processes in actual situations, additional sample blocks were cleaned (using the chosen processes) and then bonded. The bond quality of the test blocks was analyzed according to Pratt and Whitney's requirements. The Charpy impact testing was performed according to ASTM procedure {number_sign}E-23. Bond quality was determined by examining metallographic samples of the bonded test blocks for porosity along the bondline.

Hand, T.E.; Bohnert, G.W.

2000-02-02T23:59:59.000Z

272

Process for stabilization of titanium silicide particulates within titanium aluminide containing metal matrix composites  

SciTech Connect (OSTI)

This paper describes a method for forming a final composite material comprising titanium silicide particles within a titanium aluminide containing matrix. It comprises: contacting titanium, silicon and aluminum at a temperature sufficient to initiate a reaction between the titanium and silicon to thereby form a first composite comprising titanium silicide particles dispersed within an aluminum matrix; admixing the first composite with titanium and zirconium to form a mixture; heating the mixture to a temperature sufficient to convert at least a portion of the aluminum matrix to titanium aluminide; and recovering a final composite material comprising titanium silicide particles dispersed within a titanium aluminide containing matrix.

Christodoulou, L.; Williams, J.C.; Riley, M.A.

1990-04-10T23:59:59.000Z

273

Au/PO43-/TiO2 and PO43-/Au/TiO2 catalysts for CO oxidation: effect of synthesis details on catalytic performance  

SciTech Connect (OSTI)

Supported gold catalysts are active for CO oxidation, but the high-temperature deactivation is a shortcoming that may constrain their applications. Herein, we attempted to address this problem by using phosphate-doped Au/TiO{sub 2} synthesized via two routes. In route I, Au/PO{sub 4}{sup 3-}/TiO{sub 2} catalysts were prepared by treating TiO{sub 2} (Degussa P25) with diluted H{sub 3}PO{sub 4}, followed by loading gold via deposition-precipitation. In route II, PO{sub 4}{sup 3-}/Au/TiO{sub 2} catalysts were prepared by treating H{sub 2}-reduced Au/TiO{sub 2} with diluted H{sub 3}PO{sub 4}. These catalysts were systematically pretreated at 200 or 500 C before reaction testing. The overall CO conversion on 200 C-pretreated Au/PO43-/TiO2 or PO43-/Au/TiO2 was always lower than that on 200 C-pretreated Au/TiO2. However, the advantage of the phosphate addition became apparent after thermal treatment at a higher temperature. Both Au/PO43-/TiO2 and PO43-/Au/TiO2 pretreated at 500 C retained significant activities at room temperature, whereas 500 C-pretreated Au/TiO2 lost its activity. Control experiments and catalyst characterization were performed to investigate the impact of synthesis details on catalytic performance.

Ma, Zhen [ORNL; Overbury, Steven {Steve} H [ORNL; Dai, Sheng [ORNL

2007-01-01T23:59:59.000Z

274

Low-Cost Titanium Alloy Production | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Cost Titanium Alloy Production Low-Cost Titanium Alloy Production titaniumalloyproduction.pdf More Documents & Publications Low Cost Titanium Propulsion Applications Low Cost...

275

Regenerable immobilized aminosilane sorbents for carbon dioxide capture applications  

DOE Patents [OSTI]

A method for the separation of carbon dioxide from ambient air and flue gases is provided wherein a phase separating moiety with a second moiety are simultaneously coupled and bonded onto an inert substrate to create a mixture which is subsequently contacted with flue gases or ambient air. The phase-separating moiety is an amine whereas the second moiety is an aminosilane, or a Group 4 propoxide such as titanium (IV) propoxide (tetrapropyl orthotitanate, C.sub.12H.sub.28O.sub.4Ti). The second moiety makes the phase-separating moiety insoluble in the pores of the inert substrate. The new sorbents have a high carbon dioxide loading capacity and considerable stability over hundreds of cycles. The synthesis method is readily scalable for commercial and industrial production.

Gay, McMahan; Choi, Sunho; Jones, Christopher W

2014-09-16T23:59:59.000Z

276

IOP PUBLISHING NANOTECHNOLOGY Nanotechnology 20 (2009) 065606 (5pp) doi:10.1088/0957-4484/20/6/065606  

E-Print Network [OSTI]

, 15] as well as insulating [16­19] surfaces. The (110) surface of rutile titanium dioxide [20 are in colour only in the electronic version) 1. Introduction The adsorption of molecules onto surfaces has been­27]. In this work, we study the principles of adsorption of C60 on rutile TiO2(110) by non-contact atomic force

Kühnle, Angelika

277

Sensors and Actuators B 155 (2011) 159164 Contents lists available at ScienceDirect  

E-Print Network [OSTI]

Titanium dioxide (TiO2) is frequently used as matrix to immobilize proteins and enzymes for biomaterial concentration, the electron transfer rate and enzyme adsorption amount of TNT arrays were improved largely, which could be ascribed to the creation of hydroxyl groups on TNT surface due to dissociative adsorption

Cao, Guozhong

278

Role of Moisture in Adsorption, Photocatalytic Oxidation, and  

E-Print Network [OSTI]

various Hg emission sources. A novel low-cost methodology using titanium dioxide (TiO2) nanoparticlesRole of Moisture in Adsorption, Photocatalytic Oxidation, and Reemission of Elemental Mercury gas. Without UV irradiation, Hg0 adsorption was found to be insignificant, but it could be enhanced

Li, Ying

279

A theoretical approach for modeling reactivity at solidliquid interfaces Eugene V. Stefanovicha)  

E-Print Network [OSTI]

- dustry and environmental protection.1 For example, the in- terface between titanium dioxide (TiO2­water interface. Geometries and adsorption binding energies of H2O, NaCl, Na , and Cl at the NaCl 001 ­water and interactions of adsorption complexes and surface defects with the crystal lattice and solvent wa- ter

Truong, Thanh N.

280

Evidence for the Predominance of Subsurface Defects on Reduced Anatase TiO2101 Yunbin He,1  

E-Print Network [OSTI]

numbers: 68.47.Gh, 68.35.Dv, 68.37.Ef Titanium dioxide, TiO2, finds applications in a wide range on well-characterized anatase sur- faces are available. STM [13] and adsorption [14] experiments indicated

Diebold, Ulrike

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

CARBON DIOXIDE EMISSION REDUCTION  

E-Print Network [OSTI]

.5 Primary Energy Use and Carbon Dioxide Emissions for Selected US Chemical Subsectors in 1994 ...............................................................................................................16 Table 2.7 1999 Energy Consumption and Specific Energy Consumption (SEC) in the U.S. Cement Efficiency Technologies and Measures in Cement Industry.................22 Table 2.9 Energy Consumption

Delaware, University of

282

NETL: Carbon Dioxide 101 FAQs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

is carbon dioxide? is carbon dioxide? CO2 Dipole Carbon Dioxide Carbon dioxide (chemical name CO2) is a clear gas composed of one atom of carbon (C) and two atoms of oxygen (O). Carbon dioxide is one of many chemical forms of carbon on the Earth. It does not burn, and in standard temperature and pressure conditions it is stable, inert, and non-toxic. Carbon dioxide occurs naturally in small amounts (about 0.04%) in the Earth's atmosphere. The volume of CO2 in the atmosphere is equivalent to one individual in a crowd of 2,500. Carbon dioxide is produced naturally by processes deep within the Earth. This CO2 can be released at the surface by volcanoes or might be trapped in natural underground geologic CO2 deposits, similar to underground deposits of oil and natural gas. As a major greenhouse gas, CO2 helps create and

283

CARBON DIOXIDE FIXATION.  

SciTech Connect (OSTI)

Solar carbon dioxide fixation offers the possibility of a renewable source of chemicals and fuels in the future. Its realization rests on future advances in the efficiency of solar energy collection and development of suitable catalysts for CO{sub 2} conversion. Recent achievements in the efficiency of solar energy conversion and in catalysis suggest that this approach holds a great deal of promise for contributing to future needs for fuels and chemicals.

FUJITA,E.

2000-01-12T23:59:59.000Z

284

TiO2(R)/VO2(M)/TiO2(A) multilayer film as smart window: Combination of energy-saving, antifogging and self-cleaning functions  

Science Journals Connector (OSTI)

Abstract A novel Multifunctional TiO2(R)/VO2(M)/TiO2(A) multilayer film is designed and deposited by medium frequency reactive magnetron sputtering. An exciting fact that the antifogging, self-cleaning and energy-saving effects are integrated into the multilayer film could offer significant potential for wider applications of smart window. Thereinto, the bottom TiO2 layer with rutile phase plays an important role in the formation of monoclinic phase of VO2 layer and serves as an antireflection layer. Then, the VO2 layer with dominant monoclinic phase performs an automatic solar/heat control for saving energy. Finally, the top TiO2 layer containing a mixed phase of anatase and rutile displays the remarkable photocatalytic and photoinduced properties. According to optical tests, the multilayer film shows satisfactory optical properties with an excellent solar regulation efficiency (?Tsol=10.2%) and an applicable luminous transmittance (Tlum-L=30.1%) in a low-temperature state. In addition, the multilayer film implements a photoinduced super-hydrophilicity (~ 2.1°) through UV-irradiation, resulting in an antifogging effect. A high level of photocatalytic activity is detected on the surface of the multilayer film through degradation of stearic acid and rhodamine B.

Jianyun Zheng; Shanhu Bao; Ping Jin

2014-01-01T23:59:59.000Z

285

Refractive index of tetrahydrothiophene-1,1-dioxide  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2008-01-01T23:59:59.000Z

286

Dielectric constant of tetrahydrothiophene-1,1-dioxide  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2008-01-01T23:59:59.000Z

287

Method of making multilayered titanium ceramic composites  

DOE Patents [OSTI]

A method making a titanium ceramic composite involves forming a hot pressed powder body having a microstructure comprising at least one titanium metal or alloy layer and at least one ceramic particulate reinforced titanium metal or alloy layer and hot forging the hot pressed body follwed by hot rolling to substantially reduce a thickness dimension and substantially increase a lateral dimension thereof to form a composite plate or sheet that retains in the microstructure at least one titanium based layer and at least one ceramic reinforced titanium based layer in the thickness direction of the composite plate or sheet.

Fisher, George T., II; Hansen; Jeffrey S.; Oden; Laurance L.; Turner; Paul C.; Ochs; Thomas L.

1998-08-25T23:59:59.000Z

288

Nanostructured columnar heterostructures of TiO2 and Cu2O enabled by a thin-film self-assembly approach: Potential for photovoltaics  

SciTech Connect (OSTI)

Significant efforts are being devoted to the development of semiconductor thin film and nanostructured material architectures as components of solar energy harvesting and conversion devices. In particular, nanostructured assemblies with well-defined geometrical shapes have emerged as possible highly efficient and economically viable alternatives to planar junction thin film architectures , , , . However, fabrication of inorganic nanostructures generally requires complicated and multiple step processing techniques, making them less suitable for large-scale manufacturing. Hence, innovative cell architectures and materials processing schemes are essential to large-scale integration and practical viability in photovoltaic devices. Here we present here a new approach towards nanostructured thin film solar cells, by exploiting phase-separated self-assembly , . Through a single-step deposition by rf magnetron sputtering, we demonstrate growth of an epitaxial, composite film matrix formed as self-assembled, well ordered, phase segregated, and oriented p-n type interfacial nanopillars of Cu2O and TiO2. The composite films were structurally characterized to atomic resolution by a variety of analytical tools, and evaluated for preliminary optical properties using absorption measurements. We find nearly atomically distinct Cu2O-TiO2 interfaces (i.e. a p-n junction), and an absorption profile that captures a wide range of the solar spectrum extending from ultraviolet to visible wavelengths. This work opens a novel avenue for development of simple and cost-effective optically active thin film architectures, and offers promise for significantly increased photovoltaic device efficiencies using nanostructured cells that can be optimized for both incident light absorption and carrier collection.

Polat, Ozgur [ORNL; Aytug, Tolga [ORNL; Lupini, Andrew R [ORNL; Paranthaman, Mariappan Parans [ORNL; Ertugrul, Memhet [Ataturk University; Bogorin, Daniela Florentina [ORNL; Meyer III, Harry M [ORNL; Wang, Wei [ORNL; Pennycook, Stephen J [ORNL; Christen, David K [ORNL

2013-01-01T23:59:59.000Z

289

The Viscosity of Carbon Dioxide  

Science Journals Connector (OSTI)

26 July 1912 research-article The Viscosity of Carbon Dioxide P. Phillips The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access to Proceedings...

1912-01-01T23:59:59.000Z

290

Photosynthesis and carbon dioxide fixation  

Science Journals Connector (OSTI)

Photosynthesis and carbon dioxide fixation ... Photosynthetic pigments, photosystems, the Calvin cycle, the Hatch-Slack pathway, photorespiration, and photosynthetic yield improvement. ...

Muriel B. Bishop; Carl B. Bishop

1987-01-01T23:59:59.000Z

291

Hydrothermal processing of chlorinated hydrocarbons in a titanium reactor  

SciTech Connect (OSTI)

Experiments are reported on the oxidative hydrothermal destruction of chlorinated organics in a corrosion-resistant titanium reactor. Oxidation reaction conditions were 250-500 {degree}C near 650 bar and reaction times of 30-100 s in a continuous-flow reactor. Trichloroacetic acid, trichloroethylene, and 1,1,1-trichloroethane behaved similarly. The organic concentration was approximately 1.5 wt%; hydrogen peroxide was the oxidizer; sodium bicarbonate was added to achieve neutral pH. Hydrolysis occurs at low temperature, producing chloride ion and secondary organics. Carbon dioxide is the sole carbon product at 500 {degree}C. Sodium nitrate and sodium nitrite were also found to be effective oxidizers. Corrosion of the titanium was found to be slight (<0.038 mm/yr). The reaction mixture is likely not a single phase at these conditions. The destruction efficiency for trichloroethylene was estimated as 99.96% at 450 {degree}C and 60 s, with <0.02% conversion to volatile chlorinated organic byproducts. 33 refs., 9 figs., 6 tabs.

Foy, B.R.; Waldthausen, K.; Sedillo, M.A.; Buelow, S.J. [Los Alamos National Lab., NM (United States)] [Los Alamos National Lab., NM (United States)

1996-09-01T23:59:59.000Z

292

Process for sequestering carbon dioxide and sulfur dioxide  

DOE Patents [OSTI]

A process for sequestering carbon dioxide, which includes reacting a silicate based material with an acid to form a suspension, and combining the suspension with carbon dioxide to create active carbonation of the silicate-based material, and thereafter producing a metal salt, silica and regenerating the acid in the liquid phase of the suspension.

Maroto-Valer, M. Mercedes (State College, PA); Zhang, Yinzhi (State College, PA); Kuchta, Matthew E. (State College, PA); Andresen, John M. (State College, PA); Fauth, Dan J. (Pittsburgh, PA)

2009-10-20T23:59:59.000Z

293

Carbon dioxide capture and geological storage  

Science Journals Connector (OSTI)

...Blundell and Fraser Armstrong Carbon dioxide capture and geological storage Sam...Nottingham NG12 5GG, UK Carbon dioxide capture and geological storage is a...80-90%. It involves the capture of carbon dioxide at a large industrial...

2007-01-01T23:59:59.000Z

294

Carbon dioxide and climate  

SciTech Connect (OSTI)

Scientific and public interest in greenhouse gases, climate warming, and global change virtually exploded in 1988. The Department's focused research on atmospheric CO{sub 2} contributed sound and timely scientific information to the many questions produced by the groundswell of interest and concern. Research projects summarized in this document provided the data base that made timely responses possible, and the contributions from participating scientists are genuinely appreciated. In the past year, the core CO{sub 2} research has continued to improve the scientific knowledge needed to project future atmospheric CO{sub 2} concentrations, to estimate climate sensitivity, and to assess the responses of vegetation to rising concentrations of CO{sub 2} and to climate change. The Carbon Dioxide Research Program's goal is to develop sound scientific information for policy formulation and governmental action in response to changes of atmospheric CO{sub 2}. The Program Summary describes projects funded by the Carbon Dioxide Research Program during FY 1990 and gives a brief overview of objectives, organization, and accomplishments.

Not Available

1990-10-01T23:59:59.000Z

295

Recovery of titanium values from titanium grinding swarf by electric furnace smelting  

DOE Patents [OSTI]

A method for the recovery of valuable materials from titanium grinding swarf is provided comprising the steps of sieving the accumulated titanium grinding swarf to remove unwanted coarse trash and grinding wheel fragments, pelletizing, and smelting in an electric arc furnace to produce ferrotitanium and/or high titanium slag.

Gerdemann, Stephen J. (Albany, OR); White, Jack C. (Albany, OR)

1999-01-01T23:59:59.000Z

296

Recovery of titanium values from titanium grinding swarf by electric furnace smelting  

DOE Patents [OSTI]

A method for the recovery of valuable materials from titanium grinding swarf is provided comprising the steps of sieving the accumulated titanium grinding swarf to remove unwanted coarse trash and grinding wheel fragments, pelletizing, and smelting in an electric arc furnace to produce ferrotitanium and/or high titanium slag.

Gerdemann, Stephen J. (Albany, OR); White, Jack C. (Albany, OR)

1998-01-01T23:59:59.000Z

297

Recovery of titanium values from titanium grinding swarf by electric furnace smelting  

DOE Patents [OSTI]

A method for the recovery of valuable materials from titanium grinding swarf is provided comprising the steps of sieving the accumulated titanium grinding swarf to remove unwanted coarse trash and grinding wheel fragments, pelletizing, and smelting in an electric arc furnace to produce ferrotitanium and/or high titanium slag. 1 fig.

Gerdemann, S.J.; White, J.C.

1998-08-04T23:59:59.000Z

298

Low Cost Titanium ? Propulsion Applications | Department of...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Applications Low Cost Titanium Propulsion Applications 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer...

299

Synthesis of Nanodispersed Oxides of Vanadium, Titanium, Molybdenum...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Vanadium, Titanium, Molybdenum, and Tungsten on Mesoporous Silica using Atomic Layer Synthesis of Nanodispersed Oxides of Vanadium, Titanium, Molybdenum, and Tungsten on...

300

Carbon Dioxide Sequestration Industrial-scale processes are available for separating carbon dioxide from the post-  

E-Print Network [OSTI]

Carbon Dioxide Sequestration Industrial-scale processes are available for separating carbon dioxide dioxide separation and sequestration because the lower cost of carbon dioxide separation from for injection of carbon dioxide into oil or gas-bearing formations. An advantage of sequestration involving

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Reducing carbon dioxide to products  

DOE Patents [OSTI]

A method reducing carbon dioxide to one or more products may include steps (A) to (C). Step (A) may bubble said carbon dioxide into a solution of an electrolyte and a catalyst in a divided electrochemical cell. The divided electrochemical cell may include an anode in a first cell compartment and a cathode in a second cell compartment. The cathode may reduce said carbon dioxide into said products. Step (B) may adjust one or more of (a) a cathode material, (b) a surface morphology of said cathode, (c) said electrolyte, (d) a manner in which said carbon dioxide is bubbled, (e), a pH level of said solution, and (f) an electrical potential of said divided electrochemical cell, to vary at least one of (i) which of said products is produced and (ii) a faradaic yield of said products. Step (C) may separate said products from said solution.

Cole, Emily Barton; Sivasankar, Narayanappa; Parajuli, Rishi; Keets, Kate A

2014-09-30T23:59:59.000Z

302

Titanium Carbide Bipolar Plate for Electrochemical Devices  

SciTech Connect (OSTI)

Titanium carbide comprises a corrosion resistant, electrically conductive, non-porous bipolar plate for use in an electrochemical device. The process involves blending titanium carbide powder with a suitable binder material, and molding the mixture, at an elevated temperature and pressure.

LaConti, Anthony B.; Griffith, Arthur E.; Cropley, Cecelia C.; Kosek, John A.

1998-05-08T23:59:59.000Z

303

decommissioning of carbon dioxide (CO  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

decommissioning of carbon dioxide (CO decommissioning of carbon dioxide (CO 2 ) storage wells. The manual builds on lessons learned through NETL research; the experiences of the Regional Carbon Sequestration Partnerships' (RCSPs) carbon capture, utilization, and storage (CCUS) field tests; and the acquired knowledge of industries that have been actively drilling wells for more than 100 years. In addition, the BPM provides an overview of the well-

304

Recuperative supercritical carbon dioxide cycle  

DOE Patents [OSTI]

A power plant includes a closed loop, supercritical carbon dioxide system (CLS-CO.sub.2 system). The CLS-CO.sub.2 system includes a turbine-generator and a high temperature recuperator (HTR) that is arranged to receive expanded carbon dioxide from the turbine-generator. The HTR includes a plurality of heat exchangers that define respective heat exchange areas. At least two of the heat exchangers have different heat exchange areas.

Sonwane, Chandrashekhar; Sprouse, Kenneth M; Subbaraman, Ganesan; O'Connor, George M; Johnson, Gregory A

2014-11-18T23:59:59.000Z

305

12 - Laser surface modification of titanium alloys  

Science Journals Connector (OSTI)

Abstract: The laser surface engineering of titanium alloys has been developed over the past thirty years to produce a modified layer up to 1 mm in depth, thicker than alternative techniques. Continuous wave CO2 lasers have been the main lasers used for both surface cladding and alloying. Much of the early work was based on laser nitriding forming titanium nitrides throughout the molten pool. Subsequent alloying developments have included the incorporation of carbides, nitrides, oxides and silicides; and also intermetallics and rare earths, added as powders. Laser processing can now tailor surfaces with superior tribological and erosion resistant properties, compared with the untreated titanium alloys.

T.N. Baker

2010-01-01T23:59:59.000Z

306

Weyburn Carbon Dioxide Sequestration Project  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Weyburn Carbon DioxiDe SequeStration Weyburn Carbon DioxiDe SequeStration ProjeCt Background Since September 2000, carbon dioxide (CO 2 ) has been transported from the Dakota Gasification Plant in North Dakota through a 320-km pipeline and injected into the Weyburn oilfield in Saskatchewan, Canada. The CO 2 has given the Weyburn field, discovered 50 years ago, a new life: 155 million gross barrels of incremental oil are slated to be recovered by 2035 and the field is projected to be able to store 30 million tonnes of CO 2 over 30 years. CO 2 injection began in October of 2005 at the adjacent Midale oilfield, and an additional 45-60 million barrels of oil are expected to be recovered during 30 years of continued operation. A significant monitoring project associated with the Weyburn and Midale commercial

307

Corrosion of Titanium Matrix Composites  

SciTech Connect (OSTI)

The corrosion behavior of unalloyed Ti and titanium matrix composites containing up to 20 vol% of TiC or TiB{sub 2} was determined in deaerated 2 wt% HCl at 50, 70, and 90 degrees C. Corrosion rates were calculated from corrosion currents determined by extrapolation of the tafel slopes. All curves exhibited active-passive behavior but no transpassive region. Corrosion rates for Ti + TiC composites were similar to those for unalloyed Ti except at 90 degrees C where the composites were slightly higher. Corrosion rates for Ti + TiB{sub 2} composites were generally higher than those for unalloyed Ti and increased with higher concentrations of TiB{sub 2}. XRD and SEM-EDS analyses showed that the TiC reinforcement did not react with the Ti matrix during fabrication while the TiB{sub 2} reacted to form a TiB phase.

Covino, B.S., Jr.; Alman, D.E.

2002-09-22T23:59:59.000Z

308

Carbon Dioxide: Threat or Opportunity?  

E-Print Network [OSTI]

tion will be by direct combustion for the generation of power, but an increasing proportion will be con verted to syngas for chemical and fuel uses. Coal gasification is projected to become a major industry in the next decade. For every ton of coal... entering the gasification process, 1.88 lons of carbon dio xide are produced. This carbon dioxide is removed in virtually pure form by existing technology. This same technology can be applied to remove carbon dioxide from stack gases produced by power...

McKinney, A. R.

1982-01-01T23:59:59.000Z

309

Capture of carbon dioxide from ambient air  

Science Journals Connector (OSTI)

Carbon dioxide capture from ambient air could compensate for all carbon dioxide emissions to the atmosphere. Such capture would, for example, make it possible to use liquid, carbon-based fuels in cars or airplane...

K.S. Lackner

2009-09-01T23:59:59.000Z

310

Carbon Dioxide and Methane Emissions from Estuaries  

Science Journals Connector (OSTI)

Carbon dioxide and methane emissions from estuaries are reviewed in relation with biogeochemical processes and carbon cycling. In estuaries, carbon dioxide and methane emissions show a large spatial and temporal ...

Gwenaël Abril; Alberto Vieira Borges

2005-01-01T23:59:59.000Z

311

High modulus carbon fiber/titanium laminates  

E-Print Network [OSTI]

Titanium has been used to meet ever-stricter standards for high-temperature performance, creep resistance, low weight and high strength. Having low density, a high melting point, and high tensile strength, it seems like ...

Tsang, Lina

2006-01-01T23:59:59.000Z

312

Progress toward low-cost titanium  

SciTech Connect (OSTI)

Although titanium has impressive mechanical and corrosion properties, designers and engineers simply do not think of it as a cost-effective, viable alternative to aluminum and steel. Moreover, the history and use of titanium have been solidly wedded to the aerospace industry. This explains why titanium's price rises and falls cyclically with the demand for civilian and military aircraft. Although the titanium industry is temporarily depressed, developing prospects may offer reason for optimism: several non-aerospace industries are interested in using titanium. Unfortunately, the decision makers in these industries are more than cautious, remembering titanium's reputation for down today, up tomorrow seesaw prices. The US Army and Navy are two of the new and potentially large customers for titanium. Lessons from the recent conflict in Panama and the Gulf War have spurred interest in the development of lighter, more efficient, more maneuverable vehicles and artillery. Other promising nonmilitary, non-aerospace applications include suspension springs and engine parts for cars and trucks, marine and offshore oil-rig components that currently are made of stainless steels and nickel-base alloys, and piping and reactor parts for the pulp-and-paper and chemical processing industries. Existing markets, such as tubing for shell-and-tube heat exchangers, are expected to grow. For the future, the Bureau of Mines - in cooperation with the US Army Tank/Automotive Command, Warren, Michigan, and other government and industry organizations - is planning a comprehensive, five-year program on low-cost titanium that will consist of several projects that seek not only to further reduce costs, but to improve ballistic protection and other mechanical and wear properties.

Turner, P.C.; Hansen, J.S. (Bureau of Mines, Albany, OR (United States))

1993-01-01T23:59:59.000Z

313

Carbon dioxide storage professor Martin Blunt  

E-Print Network [OSTI]

Carbon dioxide storage professor Martin Blunt executive summary Carbon Capture and Storage (CCS) referS to the Set of technologies developed to capture carbon dioxide (Co2) gas from the exhausts of technologies developed to capture carbon dioxide (Co2) gas from the exhausts of power stations and from other

314

Sulfur dioxide and nitrogen dioxide levels inside and outside homes and the implications on health effects research  

Science Journals Connector (OSTI)

Sulfur dioxide and nitrogen dioxide levels inside and outside homes and the implications on health effects research ...

John D. Spengler; Benjamin G. Ferris Jr.; Douglas W. Dockery; Frank E. Speizer

1979-10-01T23:59:59.000Z

315

Thermochemical cyclic system for decomposing H/sub 2/O and/or CO/sub 2/ by means of cerium-titanium-sodium-oxygen compounds  

DOE Patents [OSTI]

A thermochemical closed cyclic process for the decomposition of water and/or carbon dioxide to hydrogen and/or carbon monoxide begins with the reaction of ceric oxide (CeO/sub 2/), titanium dioxide (TiO/sub 2/) and sodium titanate (Na/sub 2/TiO/sub 3/) to form sodium cerous titanate (NaCeTi/sub 2/O/sub 6/) and oxygen. Sodium cerous titanate (NaCeTi/sub 2/O/sub 6/) reacted with sodium carbonate (Na/sub 2/CO/sub 3/) in the presence of steam, produces hydrogen. The same reaction, in the absence of steam, produces carbon monoxide. The products, ceric oxide and sodium titanate, obtained in either case, are treated with carbon dioxide and water to produce ceric oxide, titanium dioxide, sodium titanate, and sodium bicarbonate. After dissolving sodium bicarbonate from the mixture in water, the remaining insoluble compounds are used as starting materials for a subsequent cycle. The sodium bicarbonate can be converted to sodium carbonate by heating and returned to the cycle.

Bamberger, C.E.

1980-04-24T23:59:59.000Z

316

Thermochemical cyclic system for decomposing H.sub.2 O and/or CO.sub.2 by means of cerium-titanium-sodium-oxygen compounds  

SciTech Connect (OSTI)

A thermochemical closed cyclic process for the decomposition of water and/or carbon dioxide to hydrogen and/or carbon monoxide begins with the reaction of ceric oxide (CeO.sub.2), titanium dioxide (TiO.sub.2) and sodium titanate (Na.sub.2 TiO.sub.3) to form sodium cerous titanate (NaCeTi.sub.2 O.sub.6) and oxygen. Sodium cerous titanate (NaCeTi.sub.2 O.sub.6) reacted with sodium carbonate (Na.sub.2 CO.sub.3) in the presence of steam, produces hydrogen. The same reaction, in the absence of steam, produces carbon monoxide. The products, ceric oxide and sodium titanate, obtained in either case, are treated with carbon dioxide and water to produce ceric oxide, titanium dioxide, sodium titanate, and sodium bicarbonate. After dissolving sodium bicarbonate from the mixture in water, the remaining insoluble compounds are used as starting materials for a subsequent cycle. The sodium bicarbonate can be converted to sodium carbonate by heating and returned to the cycle.

Bamberger, Carlos E. (Oak Ridge, TN)

1982-01-01T23:59:59.000Z

317

Effects of Nano-Titanium Dioxide on Freshwater Algal Population Dynamics  

E-Print Network [OSTI]

and Environment, University of Michigan, Ann Arbor, Michigan, United States of America Abstract To make used in paints, sunscreens, cosmetics, and solar technologies [1,4]. Like most nanomaterials

Cardinale, Bradley J.

318

Preparation of Copper-Based Oxygen Carrier Supported on Titanium Dioxide.  

E-Print Network [OSTI]

?? Chemical-looping combustion is an indirect oxygen combustion strategy, considered to be the most cost-effective power generation technology with the CO2 inherently concentrated. In this… (more)

Cui, Yaowen

2012-01-01T23:59:59.000Z

319

Preparation of copper-based oxygen carrier supported by titanium dioxide  

Science Journals Connector (OSTI)

Chemical-looping combustion (CLC) is an indirect oxygen combustion strategy, considered to be the most cost...2...) inherently concentrated. The oxygen carriers in the combustion process are subjected to severe e...

Yaowen Cui; Yan Cao; Wei-ping Pan

2013-12-01T23:59:59.000Z

320

Enhanced photocatalytic activity of nano titanium dioxide coated on ethanol-soluble carbon nanotubes  

SciTech Connect (OSTI)

Graphical abstract: Homogenous and dense spreading of TiO{sub 2} on surface modified CNTs and improved photocatalytic performance of TiO{sub 2} was achieved by coupling TiO{sub 2} with ethanol-soluble CNTs. Display Omitted Highlights: ? Ethanol-soluble CNTs were acquired by surface modification. ? Enhanced photoactivity of TiO{sub 2} coated on modified CNTs was obtained. ? Improved activity of TiO{sub 2} is attributed to the intimate contact between TiO{sub 2} and CNTs. ? Dense heterojunctions through Ti–O–CNTs at the interface is proposed. -- Abstract: Surface functionalized carbon nanotubes (CNTs) with ethanol solubility were synthesized and the CNTs–TiO{sub 2} nanocomposites were prepared by coupling of TiO{sub 2} with modified CNTs through a sol–gel method. The as-prepared CNTs and composites were characterized and the composite samples were evaluated for their photocatalytic activity toward the degradation of aqueous methyl orange. It is showed that the acid oxidation of CNTs leads to the embedding of oxygenated functional groups, and as a result, the acid-treated CNTs in turn may serve as chemical reactors for subsequent covalent grafting of octadecylamine. Improved photocatalytic performance of CNTs–TiO{sub 2} composites was obtained, which is mainly attributed to the high dispersion of TiO{sub 2} on ethanol-soluble CNTs and the intimate contact between TiO{sub 2} and CNTs resulted from the dense heterojunctions through the Ti-O-C structure at the interface between TiO{sub 2} and CNTs.

Fu, Xiaofei [Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098 (China)] [Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098 (China); Yang, Hanpei, E-mail: yanghanpei@hhu.edu.cn [Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098 (China)] [Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098 (China); He, Kuanyan; Zhang, Yingchao; Wu, Junming [Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098 (China)] [Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098 (China)

2013-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Nanostructured Polyaniline/Titanium Dioxide Composite Anode for Microbial Fuel Cells  

Science Journals Connector (OSTI)

Optimization of the anode shows that the composite with 30 wt % PANI gives the best bio- and electrocatalytic performance. ... The catalytic performance of the composite anode in microbial fuel cells can be optimized by adjusting the PANI percentage in the composite, and the composite with 30 wt % PANI gives the highest bio- and electrocatalytic performance. ... To optimize and develop energy prodn. ...

Yan Qiao; Shu-Juan Bao; Chang Ming Li; Xiao-Qiang Cui; Zhi-Song Lu; Jun Guo

2007-12-14T23:59:59.000Z

322

The Fabrication of Titanium Dioxide Based Anode Material Using Aerosol Method  

E-Print Network [OSTI]

energy, rechargeable Li-ion battery based on carbon nanotubewith Sb and SnSb0.5 as Li-ion battery anodes. Carbon, 2003.Li, A review of application of carbon nanotubes for lithium ion battery

Zhao, Lin

2013-01-01T23:59:59.000Z

323

Standing Wave Enhancement of Red Absorbance and Photocurrent in Dye-Sensitized Titanium Dioxide  

E-Print Network [OSTI]

the Department of Chemistry, The PennsylVania State UniVersity, UniVersity Park, PennsylVania 16802, Central, American UniVersity of Beirut, Beirut 110236, Lebanon, and National Renewable Energy Laboratory, Golden have attracted much attention as inexpensive and relatively efficient solar photovol- taic devices

324

Surface Science Letters Bulk-defect dependent adsorption on a metal oxide surface  

E-Print Network [OSTI]

-6028(01)01067-6 #12;Titanium dioxide is a wide-band gap semicon- ductor (Egap 3 eV) that can easily be reducedSurface Science Letters Bulk-defect dependent adsorption on a metal oxide surface: S/TiO2(1 1 0) E Abstract The adsorption of molecular sulfur on TiO2(1 1 0)(1 Ã? 1) has been studied with scanning tunneling

Diebold, Ulrike

325

Capturing Carbon Dioxide From Air  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Capturing Carbon Dioxide From Air Capturing Carbon Dioxide From Air Klaus S. Lackner (kl2010@columbia.edu; 212-854-0304) Columbia University 500 West 120th Street New York, NY 10027 Patrick Grimes (pgrimes@worldnet.att.net; 908-232-1134) Grimes Associates Scotch Plains, NJ 07076 Hans-J. Ziock (ziock@lanl.gov; 505-667-7265) Los Alamos National Laboratory P.O.Box 1663 Los Alamos, NM 87544 Abstract The goal of carbon sequestration is to take CO 2 that would otherwise accumulate in the atmosphere and put it in safe and permanent storage. Most proposed methods would capture CO 2 from concentrated sources like power plants. Indeed, on-site capture is the most sensible approach for large sources and initially offers the most cost-effective avenue to sequestration. For distributed, mobile sources like cars, on-board capture at affordable cost would not be

326

Reductive Sequestration of Carbon Dioxide  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Reductive Sequestration of Carbon Dioxide Reductive Sequestration of Carbon Dioxide T. Mill (ted.mill@sri.com; 650-859-3605) SRI, PS273 333 Ravenswood Menlo Park, CA 94025 D. Ross (dsross3@yahoo.com; 650-327-3842) U.S. Geological Survey, Bldg 15 MS 999 345 Middlefield Rd. Menlo Park, CA 94025 Introduction The United States currently meets 80% of its energy needs by burning fossil fuels to form CO 2 . The combustion-based production of CO 2 has evolved into a major environmental challenge that extends beyond national borders and the issue has become as politically charged as it is technologically demanding. Whereas CO 2 levels in the atmosphere had remained stable over the 10,000 years preceeding the industrial revolution, that event initiated rapid growth in CO 2 levels over the past 150 years (Stevens, 2000). The resulting accelerating accumulation of

327

IEP - Carbon Dioxide: Regulatory Drivers  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

IEP - Carbon Dioxide (CO2) Regulatory Drivers In July 7, 2009 testimony before the U.S. Senate Committee on Environment and Public Works, Secretary of Energy Steven Chu made the following statements:1 "...Overwhelming scientific evidence shows that carbon dioxide from human activity has increased the atmospheric level of CO2 by roughly 40 percent, a level one- third higher than any time in the last 800,000 years. There is also a consensus that CO2 and other greenhouse gas emissions have caused our planet to change. Already, we have seen the loss of about half of the summer arctic polar ice cap since the 1950s, a dramatically accelerating rise in sea level, and the loss of over two thousand cubic miles of glacial ice, not on geological time scales but over a mere hundred years.

328

Method for Sequestering Carbon Dioxide and Sulfur Dioxide Utilizing a Plurality of Waste Streams  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sequestering Carbon Dioxide and Sulfur Dioxide Sequestering Carbon Dioxide and Sulfur Dioxide Utilizing a Plurality of Waste Streams Opportunity The Department of Energy's National Energy Technology Laboratory is seeking licensing partners interested in implementing United States Patent Number 7,922,792 entitled "Method for Sequestering Carbon Dioxide and Sulfur Dioxide Utilizing a Plurality of Waste Streams." Disclosed in this patent is the invention of a neutralization/sequestration method that concomitantly treats bauxite residues from aluminum production processes, as well as brine wastewater from oil and gas production processes. The method uses an integrated approach that coincidentally treats multiple industrial waste by-product streams. The end results include neutralizing caustic

329

Dielectric constant of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) pyridine  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2008-01-01T23:59:59.000Z

330

Viscosity of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) ethylbenzene  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

331

Dielectric constant of the mixture (1) water; (2) tetrahydrothiophene-1,1-dioxide  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2008-01-01T23:59:59.000Z

332

Viscosity of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) 1,4-dimethylbenzene  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

333

Viscosity of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) toluene  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

334

Refractive index of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) 1-methylnapthalene  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2008-01-01T23:59:59.000Z

335

Viscosity of the mixture (1) 1,3-dioxolane; (2) tetrahydrothiophene-1,1-dioxide  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

336

Viscosity of the mixture (1) water; (2) tetrahydrothiophene-1,1-dioxide  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

337

Viscosity of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) 1,3-dimethylbenzene  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

338

Viscosity of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) benzene  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

339

Viscosity of the mixture (1) tetrahydrofuran; (2) tetrahydrothiophene-1,1-dioxide  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

340

Viscosity of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) 1,2-dimethylbenzene  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

BULK TITANIUM MICROFLUIDIC NETWORKS FOR PROTEIN SELF-ASSEMBLY STUDIES  

E-Print Network [OSTI]

BULK TITANIUM MICROFLUIDIC NETWORKS FOR PROTEIN SELF-ASSEMBLY STUDIES E.R. Parker1 , L.S. Hirst2 developed micromachining technique to fabricate microfluidic networks in thin titanium foils. These devices relevant conditions. Keywords: bulk titanium, cytoskeleton proteins, microfluidics, surface modification 1

MacDonald, Noel C.

342

Titanium in fatigue critical military aircraft structure  

SciTech Connect (OSTI)

This paper discusses the effect of fatigue requirements on titanium structure in military aircraft applications, specifically, fighter aircraft. The discussion covers how fatigue affects the design and analysis of detail parts, and how manufacturing processes affect the fatigue performance of titanium structure. Criteria for designing fighter aircraft have evolved from simple strength calculations to extremely complex computer generated analyses involving strength, durability, damage tolerance and fatigue. Fatigue life prediction is an important part of these analyses and dramatically affects the design and weight of fighter aircraft. Manufacturing processes affect fatigue performance both in a positive and negative manner. Designers must allow for the effect of these processes on titanium structure and consider the efficiency and economy of adding processes that increase fatigue life.

Gillespie, F.

1999-07-01T23:59:59.000Z

343

Titanium sealing glasses and seals formed therefrom  

DOE Patents [OSTI]

Alkaline-earth lanthanoborate sealing-glass compositions containing CaO, La{sub 2}O{sub 3}, B{sub 2}O{sub 3}, TiO{sub 2} and Al{sub 2}O{sub 3} in various combinations of mole-% are provided. These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys that have a high aqueous durability for component or device applications requiring exposure to moisture, water or body fluids. Particular applications of the titanium sealing-glass compositions include forming glass-to-metal seals for lithium batteries and implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps). 2 figs.

Brow, R.K.; McCollister, H.L.; Phifer, C.C.; Day, D.E.

1997-12-02T23:59:59.000Z

344

Titanium sealing glasses and seals formed therefrom  

DOE Patents [OSTI]

Alkaline-earth lanthanoborate sealing-glass compositions containing CaO, La.sub.2 O.sub.3, B.sub.2 O.sub.3, TiO.sub.2 and Al.sub.2 O.sub.3 in various combinations of mole-% are provided. These sealing-glass compositions are useful for forming hermetic glass-to-metal seals with titanium and titanium alloys that have a high aqueous durability for component or device applications requiring exposure to moisture, water or body fluids. Particular applications of the titanium sealing-glass compositions include forming glass-to-metal seals for lithium batteries and implanted biomedical devices (e.g. batteries, pacemakers, defibrillators, pumps).

Brow, Richard K. (Albuquerque, NM); McCollister, Howard L. (Albuquerque, NM); Phifer, Carol C. (Albuquerque, NM); Day, Delbert E. (Rolla, MO)

1997-01-01T23:59:59.000Z

345

Hydrogen storage with titanium-functionalized graphene  

E-Print Network [OSTI]

We report on hydrogen adsorption and desorption on titanium-covered graphene in order to test theoretical proposals to use of graphene functionalized with metal atoms for hydrogen storage. At room temperature titanium islands grow with an average diameter of about 10 nm. Samples were then loaded with hydrogen, and its desorption kinetics was studied by thermal desorption spectroscopy. We observe the desorption of hydrogen in the temperature range between 400K and 700 K. Our results demonstrate the stability of hydrogen binding at room temperature and show that hydrogen desorbs at moderate temperatures in line with what required for practical hydrogen-storage applications.

Mashoff, Torge; Tanabe, Shinichi; Hibino, Hiroki; Beltram, Fabio; Heun, Stefan

2013-01-01T23:59:59.000Z

346

An analysis of the impact of having uranium dioxide mixed in with plutonium dioxide  

SciTech Connect (OSTI)

An assessment was performed to show the impact on airborne release fraction, respirable fraction, dose conversion factor and dose consequences of postulated accidents at the Plutonium Finishing Plant involving uranium dioxide rather than plutonium dioxide.

MARUSICH, R.M.

1998-10-21T23:59:59.000Z

347

Putting the pressure on carbon dioxide | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Putting the pressure on carbon dioxide Improving the chances for fuel recovery and carbon sequestration Artwork from this research graces the cover of Environmental Science...

348

Sandia National Laboratories: reducing carbon dioxide emissions  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

carbon dioxide emissions Measurements of Thermal Stratification in a Homogenous Charge Compression Ignition Engine On February 27, 2013, in CRF, Energy, Facilities, News, News &...

349

Club Convergence in Carbon Dioxide Emissions  

Science Journals Connector (OSTI)

We examine convergence in carbon dioxide emissions among 128 countries for the period 1960–...2 emissions among all the countries under scrutiny in...

Ekaterini Panopoulou; Theologos Pantelidis

2009-09-01T23:59:59.000Z

350

Surface engineering and chemical characterization in ion-nitrided titanium and titanium alloys  

Science Journals Connector (OSTI)

The chemical and physical characteristics of ion-nitrided surface layers, obtained on ?-? titanium alloys, are examined and correlated both with the working conditions adopted in the ion-nitriding process and wit...

T. Bacci; G. Pradelli; B. Tesi; C. Gianoglio; C. Badini

1990-10-01T23:59:59.000Z

351

Titanium Metal Powder Production by the Plasma Quench Process  

SciTech Connect (OSTI)

The goals of this project included the scale-up of the titanium hydride production process to a production rate of 50 kg/hr at a purity level of 99+%. This goal was to be achieved by incrementally increasing the production capability of a series of reactor systems. This methodic approach was designed to allow Idaho Titanium Technologies to systematically address the engineering issues associated with plasma system performance, and powder collection system design and performance. With quality powder available, actual fabrication with the titanium hydride was to be pursued. Finally, with a successful titanium production system in place, the production of titanium aluminide was to be pursued by the simultaneously injection of titanium and aluminum precursors into the reactor system. Some significant accomplishments of the project are: A unique and revolutionary torch/reactor capable of withstanding temperatures up to 5000 C with high thermal efficiency has been operated. The dissociation of titanium tetrachloride into titanium powder and HC1 has been demonstrated, and a one-megawatt reactor potentially capable of producing 100 pounds per hour has been built, but not yet operated at the powder level. The removal of residual subchlorides and adsorbed HC1 and the sintering of powder to form solid bodies have been demonstrated. The production system has been operated at production rates up to 40 pounds per hour. Subsequent to the end of the project, Idaho Titanium Technologies demonstrated that titanium hydride powder can indeed be sintered into solid titanium metal at 1500 C without sintering aids.

R. A. Cordes; A. Donaldson

2000-09-01T23:59:59.000Z

352

DOE - Office of Legacy Management -- Titanium Alloys Manufacturing Co Div  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Titanium Alloys Manufacturing Co Titanium Alloys Manufacturing Co Div of National Lead of Ohio - NY 41 FUSRAP Considered Sites Site: TITANIUM ALLOYS MANUFACTURING CO., DIV. OF NATIONAL LEAD OF OHIO (NY.41) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: Titanium Alloy Metals Titanium Alloy Manufacturing Division Titanium Alloy Manufacturing (TAM) Division of National Lead Company The Titanium Pigment Co. NL Industries ICD/Niagara NY.41-1 NY.41-2 NY.41-3 Location: Niagara Falls , New York NY.41-1 Evaluation Year: 1993 NY.41-4 Site Operations: Produced commercial grade zirconium tetrachloride; conducted research and development relating to solid metallic hydride moderators; and experimental work relative to the conversion of thorium scrap to anhydrous tetrachloride. NY.41-5

353

Titanium nitride electrodes for thermoelectric generators  

DOE Patents [OSTI]

The invention is directed to a composite article suitable for use in thermoelectric generators. The article comprises a thin film of titanium nitride as an electrode deposited onto solid electrolyte. The invention is also directed to the method of making same.

Novak, Robert F. (Farmington Hills, MI); Schmatz, Duane J. (Dearborn Heights, MI); Hunt, Thomas K. (Ann Arbor, MI)

1987-12-22T23:59:59.000Z

354

Improving conversion efficiency of CdS quantum dots-sensitized TiO2 nanotube arrays by doping with Zn2+ and decorating with ZnO nanoparticles  

Science Journals Connector (OSTI)

Abstract The Zn-doped TiO2 nanotube arrays (TNTs) decorated with ZnO nanoparticles have been prepared via electrochemical anodization and immersing method. Furthermore, the CdS quantum dots (QDs) were deposited on the prepared Zn-doped TNTs-ZnO thin films by chemical bath deposition (CBD) method to fabricate the CdS QDs-sensitized Zn-doped TNTs-ZnO photoelectrodes. The nanostructure, morphology, optical properties and electrochemical properties of the CdS/Zn-doped TNTs-ZnO photoelectrode with comparison to those of the CdS/TNTs photoelectrodes were investigated. It has been found that the Zn-doped TNTs-ZnO photoelectrodes significantly increased the UV–vis light absorption of the CdS/Zn-doped TNTs-ZnO photoelectrodes and reduced the charge recombination at the surfaces of the CdS/Zn-doped TNTs-ZnO photoelectrodes. As a consequence, when the Zn-doped TNTs-ZnO film was adopted instead of the plain \\{TNTs\\} film, the light-chemical energy conversion efficiency of the CdS/Zn-doped TNTs-ZnO photoelectrode was much improved compared with the CdS/TNTs photoelectrode. A maximum energy conversion efficiency achieved for the CdS/Zn-doped TNTs-ZnO photoelectrode is 3.86%, which is a 17% improvement compared with the maximum energy conversion efficiency of 3.29% achieved for the CdS/TNTs photoelectrodes.

Chong Chen; Lei Wang; Fumin Li; Lanyu Ling

2014-01-01T23:59:59.000Z

355

Photoassisted degradation of pentachlorophenol in a simulated soil washing system containing nonionic surfactant Triton X-100 with La–B codoped TiO2 under visible and solar light irradiation  

Science Journals Connector (OSTI)

A novel method to remediate soil washing contaminants was developed through the utilization of La–B codoped TiO2 (La–B–TiO2) nanoparticle in the photocatalysis of a simulated complex system containing hydrophobic pentachlorophenol (PCP) and nonionic surfactant Triton X-100 (TX-100) under visible and solar light irradiation. The photocatalyst synthesized by the sol–gel hydrothermal process exhibited excellent visible light photocatalytic activity and a modified surface. The investigation of the adsorption kinetics and isotherms showed that the distribution of PCP between the catalyst surface and the bulk solution significantly depended on the initial TX-100 concentration (CTX-0). The formed superficial reactive monolayer at CTX-0 ranging from 0.023 to 0.23 mM by the dramatic hydrophobic interactions between the TX-100 moiety and hydrophobic sites on the La–B–TiO2 could remarkably capture the target pollutant. The PCP implanted into the hydrophobic space could be removed effectively in the photocatalysis process induced by visible and solar light, ascribing to the facile availability of PCP to the photo-yielded oxidative radicals on the La–B–TiO2 surface. Additionally, the preferential decomposition of the incorporated PCP, rather than the TX-100, facilitated the removal of the target contaminant and the recycling of the surfactant, which is beneficial to the practical application of this technique under mild and natural light sources.

J.W. Liu; R. Han; H.T. Wang; Y. Zhao; Z. Chu; H.Y. Wu

2011-01-01T23:59:59.000Z

356

Carbon Dioxide Capture from Coal-Fired  

E-Print Network [OSTI]

Carbon Dioxide Capture from Coal-Fired Power Plants: A Real Options Analysis May 2005 MIT LFEE 2005 are valued using the "real options" valuation methodology in an uncertain carbon dioxide (CO2) price (baseline IGCC), and IGCC with pre-investments that make future retrofit for CO2 capture less expensive (pre

357

Optimize carbon dioxide sequestration, enhance oil recovery  

E-Print Network [OSTI]

- 1 - Optimize carbon dioxide sequestration, enhance oil recovery January 8, 2014 Los Alamos simulation to optimize carbon dioxide (CO2) sequestration and enhance oil recovery (CO2-EOR) based on known production. Due to carbon capture and storage technology advances, prolonged high oil prices

358

Predicting Future Atmospheric Carbon Dioxide Levels  

Science Journals Connector (OSTI)

...Predicting future atmospheric carbon dioxide levels...1978012175 air atmosphere biosphere carbon...Predicting future atmospheric carbon dioxide levels...re-quired 5-Mhz bandwidth, which...synchronization rate of 16 khz and the picture...the interstellar plasma. For UHF frequencies...

U. Siegenthaler; H. Oeschger

1978-01-27T23:59:59.000Z

359

Haverford Researchers Create Carbon Dioxide-Separating Polymer  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Haverford College Researchers Create Carbon Dioxide-Separating Polymer Haverford College Researchers Create Carbon Dioxide-Separating Polymer August 1, 2012 | Tags: Basic Energy...

360

Table 2. 2011 State energy-related carbon dioxide emisssions...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

2011 State energy-related carbon dioxide emissions by fuel million metric tons of carbon dioxide shares State Coal Petroleum Natural Gas Total Coal Petroleum Natural Gas Alabama...

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

carbon dioxide emissions | OpenEI  

Open Energy Info (EERE)

dioxide emissions dioxide emissions Dataset Summary Description Total annual carbon dioxide emissions by country, 2005 to 2009 (million metric tons). Compiled by Energy Information Administration (EIA). Source EIA Date Released Unknown Date Updated Unknown Keywords carbon dioxide emissions EIA world Data text/csv icon total_carbon_dioxide_emissions_from_the_consumption_of_energy_2005_2009million_metric_tons.csv (csv, 12.3 KiB) Quality Metrics Level of Review Peer Reviewed Comment Temporal and Spatial Coverage Frequency Time Period 2005 - 2009 License License Other or unspecified, see optional comment below Comment Rate this dataset Usefulness of the metadata Average vote Your vote Usefulness of the dataset Average vote Your vote Ease of access Average vote Your vote Overall rating

362

EIA - Greenhouse Gas Emissions - Carbon Dioxide Emissions  

Gasoline and Diesel Fuel Update (EIA)

2. Carbon Dioxide Emissions 2. Carbon Dioxide Emissions 2.1. Total carbon dioxide emissions Annual U.S. carbon dioxide emissions fell by 419 million metric tons in 2009 (7.1 percent), to 5,447 million metric tons (Figure 9 and Table 6). The annual decrease-the largest over the 19-year period beginning with the 1990 baseline-puts 2009 emissions 608 million metric tons below the 2005 level, which is the Obama Administration's benchmark year for its goal of reducing U.S. emissions by 17 percent by 2020. The key factors contributing to the decrease in carbon dioxide emissions in 2009 included an economy in recession with a decrease in gross domestic product of 2.6 percent, a decrease in the energy intensity of the economy of 2.2 percent, and a decrease in the carbon intensity of energy supply of

363

Time-resolved surface infrared spectroscopy during atomic layer deposition of TiO{sub 2} using tetrakis(dimethylamido)titanium and water  

SciTech Connect (OSTI)

Atomic layer deposition of titanium dioxide using tetrakis(dimethylamido)titanium (TDMAT) and water vapor is studied by reflection-absorption infrared spectroscopy (RAIRS) with a time resolution of 120?ms. At 190?°C and 240?°C, a decrease in the absorption from adsorbed TDMAT is observed without any evidence of an adsorbed product. Ex situ measurements indicate that this behavior is not associated with an increase in the impurity concentration or a dramatic change in the growth rate. A desorbing decomposition product is consistent with these observations. RAIRS also indicates that dehydroxylation of the growth surface occurs only among one type of surface hydroxyl groups. Molecular water is observed to remain on the surface and participates in reactions even at a relatively high temperature (110?°C) and with long purge times (30?s)

Sperling, Brent A., E-mail: brent.sperling@nist.gov; Hoang, John; Kimes, William A.; Maslar, James E. [Chemical Sciences Division, National Institute of Standards and Technology, 100 Bureau Dr., Stop 8320, Gaithersburg, Maryland 20899-8320 (United States); Steffens, Kristen L. [Biomolecular Measurement Division, National Institute of Standards and Technology, 100 Bureau Dr., Stop 8362, Gaithersburg, Maryland 20899-8362 (United States); Nguyen, Nhan V. [Semiconductor and Dimensional Metrology Division, National Institute of Standards and Technology, 100 Bureau Dr., Stop 8120, Gaithersburg, Maryland 20899-8120 (United States)

2014-05-15T23:59:59.000Z

364

Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition  

DOE Patents [OSTI]

A ceramic composition composition is described. The ceramic composition consists essentially of from about 84 to 96 w/o titanium diboride, from about 1 to 9 w/o chromium diboride, and from about 3 to aobut 15 w/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated body containing stoichiometric quantities of titanium diboride and chromium diboride is provided. Step 2--The consolidated body is enclosed in and in contact with a thermally insulated package of yttria granules having a thickness of at least 0.5 inches. Step 3--The consolidated body enclosed in the thermally insulated package of yttria granules is heated in a microwave oven with microwave energy to a temperature equal to or greater than 1,900 degrees centigrade to sinter and uniformly disperse yttria particles having a size range from about 1 to about 12 microns throughout the consolidated body forming a densified body consisting essentially of titanium diboride, chromium diboride, and yttrium-titanium-oxide. The resulting densified body has enhanced fracture toughness and hardness.

Holcombe, Cressie E. (Knoxville, TN); Dykes, Norman L. (Oak Ridge, TN)

1992-01-01T23:59:59.000Z

365

Process for making a titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition  

DOE Patents [OSTI]

A ceramic composition is described. The ceramic composition consists essentially of from about 84 to 96 w/o titanium diboride, from about 1 to 9 w/o chromium diboride, and from about 3 to about 15 w/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated body containing stoichiometric quantities of titanium diboride and chromium diboride is provided. Step 2--The consolidated body is enclosed in and in contact with a thermally insulated package of yttria granules having a thickness of at least 0.5 inches. Step 3--The consolidated body enclosed in the thermally insulated package of yttria granules is heated in a microwave oven with microwave energy to a temperature equal to or greater than 1,900 degrees centigrade to sinter and uniformly disperse yttria particles having a size range from about 1 to about 12 microns throughout the consolidated body forming a densified body consisting essentially of titanium diboride, chromium diboride, and yttrium-titanium-oxide. The resulting densified body has enhanced fracture toughness and hardness. No Drawings

Holcombe, C.E.; Dykes, N.L.

1992-04-28T23:59:59.000Z

366

NETL: Carbon Dioxide 101 FAQs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

is the greenhouse effect? is the greenhouse effect? Greenhouse Effect Greenhouse Effect The greenhouse effect is used to describe the phenomenon whereby the Earth's atmosphere traps solar radiation, caused by the presence of gases, such as carbon dioxide (CO2), methane (CH4), and water vapor (H2O), in the atmosphere that allow incoming sunlight to pass through but absorb heat radiated back from the Earth's surface, resulting in higher temperatures. The greenhouse effect gets its name from what actually happens in a greenhouse. In a greenhouse, short wavelength visible sunlight shines through the glass panes and warms the air and the plants inside. The radiation emitted from the heated objects is of longer wavelength and is unable to pass through the glass barrier, maintaining a warm temperature

367

Thermal coatings for titanium-aluminum alloys  

SciTech Connect (OSTI)

Titanium aluminides and titanium alloys are candidate materials for use in hot structure and heat-shield components of hypersonic vehicles because of their good strength-to-weight characteristics at elevated temperature. However, in order to utilize their maximum temperature capability, they must be coated to resist oxidation and to have a high total remittance. Also, surface catalysis for recombination of dissociated species in the aerodynamic boundary layer must be minimized. Very thin chemical vapor deposition (CVD) coatings are attractive candidates for this application because of durability and very light weight. To demonstrate this concept, coatings of boron-silicon and aluminum-boron-silicon compositions were applied to the titanium-aluminides alpha2 (Ti-14Al-21Nb), super-alpha2 (Ti-14Al-23-Nb-2V), and gamma (Ti-33Al-6Nb-1Ta) and to the titanium alloy beta-21S (Ti-15Mo-3Al-3Nb-0.2Si). Coated specimens of each alloy were subjected to a set of simulated hypersonic vehicle environmental tests to determine their properties of oxidation resistance, surface catalysis, radiative emittance, and thermal shock resistance. Surface catalysis results should be viewed as relative performance only of the several coating-alloy combinations tested under the specific environmental conditions of the LaRC Hypersonic Materials Environmental Test System (HYMETS) arc-plasma-heated hypersonic wind tunnel. Tests were also conducted to evaluate the hydrogen transport properties of the coatings and any effects of the coating processing itself on fatigue life of the base alloys. Results are presented for three types of coatings, which are as follows: (1) a single layer boron silicon coating, (2) a single layer aluminum-boron-silicon coating, and (3) a multilayer coating consisting of an aluminum-boron-silicon sublayer with a boron-silicon outer layer.

Cunnington, G.R.; Clark, R.K.; Robinson, J.C.

1993-04-01T23:59:59.000Z

368

Low Cost PM Technology for Particle Reinforced Titanium Automotive...  

Broader source: Energy.gov (indexed) [DOE]

Low Cost PM Technology for Particle Reinforced Titanium Automotive Components: Manufacturing Process Feasibility StudyAMD 310 Low Cost PM Technology for Particle Reinforced...

369

Process for preparing fine grain titanium carbide powder  

DOE Patents [OSTI]

A method for preparing finely divided titanium carbide powder in which an organotitanate is reacted with a carbon precursor polymer to provide an admixture of the titanium and the polymer at a molecular-level due to a crosslinking reaction between the organotitanate and the polymer. The resulting gel is dried, pyrolyzed to drive off volatile components and provide carbon. The resulting solids are then heated at an elevated temperature to convert the titanium and carbon to high-purity titanium carbide powder in a submicron size range.

Janey, Mark A. (Concord, TN)

1986-01-01T23:59:59.000Z

370

Friction and Wear Enhancement of Titanium Alloy Engine Components...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Merit Review and Peer Evaluation pm007blau2011o.pdf More Documents & Publications Friction and Wear Enhancement of Titanium Alloy Engine Components Vehicle Technologies Office...

371

E-Print Network 3.0 - anodized titanium discs Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: As a specimen material, we chose sintered titanium. Chemically pure titanium powder was prepared by a rotating-anode... Internal Friction and Elastic Constants of...

372

Carbon Dioxide Information Analysis Center (CDIAC)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Latest Estimates Latest Estimates Atmos CO2 Level 397.31 ppm Fossil CO2 Emissions 9,167 MMT Carbon Global Temp Anomaly +0.56°C / +1.01°F Global Sea Level Rise +2.9 ± 0.4 mm/y Carbon Dioxide Information Analysis Center The Carbon Dioxide Information Analysis Center (CDIAC) is the primary climate-change data and information analysis center of the U.S. Department of Energy (DOE). CDIAC is located at DOE's Oak Ridge National Laboratory (ORNL) and includes the World Data Center for Atmospheric Trace Gases. CDIAC's data holdings include estimates of carbon dioxide emissions from fossil-fuel consumption and land-use changes; records of atmospheric concentrations of carbon dioxide and other radiatively active trace gases; carbon cycle and terrestrial carbon management datasets and analyses; and

373

Carbon Dioxide Emission Factors for Coal  

Reports and Publications (EIA)

The Energy Information Administration (EIA) has developed factors for estimating the amount of carbon dioxide emitted, accounting for differences among coals, to reflect the changing "mix" of coal in U.S. coal consumption.

1994-01-01T23:59:59.000Z

374

Storage of Carbon Dioxide in Offshore Sediments  

Science Journals Connector (OSTI)

...Carbon Dioxide in Offshore Sediments 10...efforts to increase energy efficiency; efforts...sources, including renewable and nuclear energy; and investment...repositories. Offshore geological repositories...between Scotland and Norway and far out of...

Daniel P. Schrag

2009-09-25T23:59:59.000Z

375

Displacement of crude oil by carbon dioxide  

E-Print Network [OSTI]

DISPLACEMENT OF CRUDE OIL BY CARBON DIOXIDE A Thesis by OLUSEGUN OMOLE Submitted to the Graduate College of Texas ASM University in part';al fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1980 Major Subject...: Petroleum Engineering DISPLACEMENT OF CRUDE OIL BY CARBON DIOXIDE A Thesis by OLUSEGUN OMOLE Approved as to style and content by: hairman of Committee / (Member (Member (Member (Hea o Depart ent December 1980 ABSTRACT Displacement of Crude Oil...

Omole, Olusegun

1980-01-01T23:59:59.000Z

376

Dielectric constant of the mixture (1) ethane-1,2-diol; (2) tetrahydrothiophene-1,1-dioxide  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2008-01-01T23:59:59.000Z

377

Refractive index of the mixture (1) ethane-1,2-diol; (2) tetrahydrothiophene-1,1-dioxide  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2008-01-01T23:59:59.000Z

378

Dielectric constant of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) 2-(2-hydroxyethoxy)-ethanol  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2008-01-01T23:59:59.000Z

379

Refractive index of the mixture (1) tetrahydrothiophene-1,1-dioxide; (2) 2-(2-hydroxyethoxy)-ethanol  

Science Journals Connector (OSTI)

Substance name(s): tetrahydrothiophene-1,1-dioxide; tetrahydrothiophene-S,S-dioxide; tetrahydro-thiophene-1,1 ... ,1-dioxide; thiacyclopentane dioxide; tetramethylene sulfone; tetrahydrothiophene 1...

Ch. Wohlfarth

2008-01-01T23:59:59.000Z

380

Hydrogen and deuterium sorption on titanium under vacuum conditions  

Science Journals Connector (OSTI)

Investigation of titanium sponge as storage material for Hydrogen isotopes, Protium and Deuterium, represent one of the main issue to solve in order to build a safe storage container for Tritium resulted in a heavy water detritiation facility. During ... Keywords: deuterium, hydrogen, isotopes, storage, titanium

Eusebiu Ilarian Ionete; Bogdan Monea; Marius Zamfirache

2011-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Vanadium-pumped titanium x-ray laser  

DOE Patents [OSTI]

A resonantly photo-pumped x-ray laser is formed of a vanadium and titanium foil combination that is driven by two beams of intense line focused optical laser radiation. Ground state neon-like titanium ions are resonantly photo-pumped by line emission from fluorine-like vanadium ions. 4 figs.

Nilsen, J.

1992-05-26T23:59:59.000Z

382

Vanadium-pumped titanium x-ray laser  

DOE Patents [OSTI]

A resonantly photo-pumped x-ray laser (10) is formed of a vanadium (12) and titanium (14) foil combination (16) that is driven by two beams (18, 20) of intense line focused (22, 24) optical laser radiation. Ground state neon-like titanium ions (34) are resonantly photo-pumped by line emission from fluorine-like vanadium ions (32).

Nilsen, Joseph (Livermore, CA)

1992-01-01T23:59:59.000Z

383

Titanium oral implants: surface characteristics, interface biology and clinical outcome  

Science Journals Connector (OSTI)

...outcome of a soft bone implant (prototype Mk IV) and the standard Branemark implant...Tengvall 2010 The effect of heat- or ultra violet ozone-treatment of titanium on...Rolander, and B. Kasemo 1991 Preparation of ultra-thin oxide windows on titanium for TEM...

2010-01-01T23:59:59.000Z

384

Carbon or boron modified titanium silicide  

DOE Patents [OSTI]

A titanium silicide material based on Ti{sub 5}Si{sub 3} intermetallic compound exhibits substantially improved oxidative stability at elevated temperatures. In particular, carbon is added to a Ti{sub 5}Si{sub 3} base material in an amount (e.g. about 0.3 to about 3.6 weight % C) effective to impart substantially improved oxidative stability at elevated temperatures, such as about 1000 C. Boron is added to a Ti{sub 5}Si{sub 3} base material in an amount (e.g. about 0.3 to about 3.3 weight % B) to this same end. 3 figs.

Thom, A.J.; Akinc, M.

1998-07-14T23:59:59.000Z

385

Vehicle Technologies Office: Fact #464: April 9, 2007 Carbon Dioxide  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

4: April 9, 2007 4: April 9, 2007 Carbon Dioxide Emissions to someone by E-mail Share Vehicle Technologies Office: Fact #464: April 9, 2007 Carbon Dioxide Emissions on Facebook Tweet about Vehicle Technologies Office: Fact #464: April 9, 2007 Carbon Dioxide Emissions on Twitter Bookmark Vehicle Technologies Office: Fact #464: April 9, 2007 Carbon Dioxide Emissions on Google Bookmark Vehicle Technologies Office: Fact #464: April 9, 2007 Carbon Dioxide Emissions on Delicious Rank Vehicle Technologies Office: Fact #464: April 9, 2007 Carbon Dioxide Emissions on Digg Find More places to share Vehicle Technologies Office: Fact #464: April 9, 2007 Carbon Dioxide Emissions on AddThis.com... Fact #464: April 9, 2007 Carbon Dioxide Emissions Carbon dioxide (CO2) emissions from the transportation sector began to

386

Carbon dioxide capture process with regenerable sorbents  

DOE Patents [OSTI]

A process to remove carbon dioxide from a gas stream using a cross-flow, or a moving-bed reactor. In the reactor the gas contacts an active material that is an alkali-metal compound, such as an alkali-metal carbonate, alkali-metal oxide, or alkali-metal hydroxide; or in the alternative, an alkaline-earth metal compound, such as an alkaline-earth metal carbonate, alkaline-earth metal oxide, or alkaline-earth metal hydroxide. The active material can be used by itself or supported on a substrate of carbon, alumina, silica, titania or aluminosilicate. When the active material is an alkali-metal compound, the carbon-dioxide reacts with the metal compound to generate bicarbonate. When the active material is an alkaline-earth metal, the carbon dioxide reacts with the metal compound to generate carbonate. Spent sorbent containing the bicarbonate or carbonate is moved to a second reactor where it is heated or treated with a reducing agent such as, natural gas, methane, carbon monoxide hydrogen, or a synthesis gas comprising of a combination of carbon monoxide and hydrogen. The heat or reducing agent releases carbon dioxide gas and regenerates the active material for use as the sorbent material in the first reactor. New sorbent may be added to the regenerated sorbent prior to subsequent passes in the carbon dioxide removal reactor.

Pennline, Henry W. (Bethel Park, PA); Hoffman, James S. (Library, PA)

2002-05-14T23:59:59.000Z

387

SEQUESTERING CARBON DIOXIDE IN COALBEDS  

SciTech Connect (OSTI)

The authors' long-term goal is to develop accurate prediction methods for describing the adsorption behavior of gas mixtures on solid adsorbents over complete ranges of temperature, pressure, and adsorbent types. The originally-stated, major objectives of the current project are to: (1) measure the adsorption behavior of pure CO{sub 2}, methane, nitrogen, and their binary and ternary mixtures on several selected coals having different properties at temperatures and pressures applicable to the particular coals being studied, (2) generalize the adsorption results in terms of appropriate properties of the coals to facilitate estimation of adsorption behavior for coals other than those studied experimentally, (3) delineate the sensitivity of the competitive adsorption of CO{sub 2}, methane, and nitrogen to the specific characteristics of the coal on which they are adsorbed; establish the major differences (if any) in the nature of this competitive adsorption on different coals, and (4) test and/or develop theoretically-based mathematical models to represent accurately the adsorption behavior of mixtures of the type for which measurements are made. As this project developed, an important additional objective was added to the above original list. Namely, we were encouraged to interact with industry and/or governmental agencies to utilize our expertise to advance the state of the art in coalbed adsorption science and technology. As a result of this additional objective, we participated with the Department of Energy and industry in the measurement and analysis of adsorption behavior as part of two distinct investigations. These include (a) Advanced Resources International (ARI) DOE Project DE-FC26-00NT40924, ''Adsorption of Pure Methane, Nitrogen, and Carbon Dioxide and Their Mixtures on Wet Tiffany Coal'', and (b) the DOE-NETL Project, ''Round Robin: CO{sub 2} Adsorption on Selected Coals''. These activities, contributing directly to the DOE projects listed above, also provided direct synergism with the original goals of our work. Specific accomplishments of this project are summarized below in three broad categories: experimentation, model development, and coal characterization.

K.A.M. Gasem; R.L. Robinson, Jr.; J.E. Fitzgerald; Z. Pan; M. Sudibandriyo

2003-04-30T23:59:59.000Z

388

sulfur dioxide emissions | OpenEI  

Open Energy Info (EERE)

sulfur dioxide emissions sulfur dioxide emissions Dataset Summary Description Emissions from energy use in buildings are usually estimated on an annual basis using annual average multipliers. Using annual numbers provides a reasonable estimation of emissions, but it provides no indication of the temporal nature of the emissions. Therefore, there is no way of understanding the impact on emissions from load shifting and peak shaving technologies such as thermal energy storage, on-site renewable energy, and demand control. Source NREL Date Released April 11th, 2011 (3 years ago) Date Updated April 11th, 2011 (3 years ago) Keywords buildings carbon dioxide emissions carbon footprinting CO2 commercial buildings electricity emission factors ERCOT hourly emission factors interconnect nitrogen oxides

389

A Vortex Contactor for Carbon Dioxide Separations  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Vortex Contactor for Carbon Dioxide Separations Vortex Contactor for Carbon Dioxide Separations Kevin T. Raterman (ratekt@inel.gov; 208-526-5444) Michael McKellar (mgq@inel.gov; 208-526-1346) Anna Podgorney (poloak@inel.gov; 208-526-0064) Douglas Stacey (stacde@inel.gov; 208-526-3938) Terry Turner (tdt@inel.gov; 208-526-8623) Idaho National Engineering and Environmental Laboratory P.O. Box 1625 Idaho Falls, Idaho 83415-2110 Brian Stokes (bxs9@pge.com; 415-972-5591) John Vranicar (jjv2@pge.com; 415-972-5591) Pacific Gas & Electric Company 123 Mission Street San Francisco, CA 94105 Introduction Many analysts 1,2,3 identify carbon dioxide (CO 2 ) capture and separation as a major roadblock in efforts to cost effectively mitigate greenhouse gas emissions via sequestration. An assessment 4 conducted by the International Energy Agency (IEA)

390

Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide  

Science Journals Connector (OSTI)

...which combine a battery-like redox electrode...conductors [e.g., graphene oxide or TiO 2...materials for Li ion batteries? Computational studies...by activation of graphene . Science 332 , 1537...high-performance and flexible graphene-based electrochemical...Vehicle Technologies, Batteries for Advanced Transportation...

Maria R. Lukatskaya; Olha Mashtalir; Chang E. Ren; Yohan Dall’Agnese; Patrick Rozier; Pierre Louis Taberna; Michael Naguib; Patrice Simon; Michel W. Barsoum; Yury Gogotsi

2013-09-27T23:59:59.000Z

391

Titanium aluminide intermetallic alloys with improved wear resistance  

SciTech Connect (OSTI)

The invention is directed to a method for producing a titanium aluminide intermetallic alloy composition having an improved wear resistance, the method comprising heating a titanium aluminide intermetallic alloy material in an oxygen-containing environment at a temperature and for a time sufficient to produce a top oxide layer and underlying oxygen-diffused layer, followed by removal of the top oxide layer such that the oxygen-diffused layer is exposed. The invention is also directed to the resulting oxygen-diffused titanium aluminide intermetallic alloy, as well as mechanical components or devices containing the improved alloy composition.

Qu, Jun; Lin, Hua-Tay; Blau, Peter J.; Sikka, Vinod K.

2014-07-08T23:59:59.000Z

392

EIA - International Energy Outlook 2007 - Energy-Related Carbon Dioxide  

Gasoline and Diesel Fuel Update (EIA)

Energy-Relaated Carbon Dioxide Emissions Energy-Relaated Carbon Dioxide Emissions International Energy Outlook 2007 Chapter 7 - Energy-Related Carbon Dioxide Emissions In 2004, non-OECD emissions of carbon dioxide were greater than OECD emissions for the first time. In 2030, carbon dioxide emissions from the non-OECD countries are projected to exceed those from the OECD countries by 57 percent. Figure 77. World Energy-Related Carbon Dioxide Emissions by Region, 2003-2030 (Billion Metric Tons). Need help, contact the National Energy Information Center on 202-585-8800. Figure Data Figure 78. World energy-Related Carbon Dioxide Emissions by Fuel Type, 1990-2030 (Billion Metric Tons). Need help, contact the National Energy at 202-586-8800. Figure Data Carbon dioxide is the most abundant anthropogenic (human-caused) greenhouse

393

EIA - International Energy Outlook 2008-Energy-Related Carbon Dioxide  

Gasoline and Diesel Fuel Update (EIA)

Energy-Related Carbon Dioxide Emissions Energy-Related Carbon Dioxide Emissions International Energy Outlook 2008 Chapter 7 - Energy-Related Carbon Dioxide Emissions In 2005, non-OECD emissions of carbon dioxide exceeded OECD emissions by 7 percent. In 2030, carbon dioxide emissions from the non-OECD countries are projected to exceed those from the OECD countries by 72 percent. Figure 75. World Energy-Related Carbon Dioxide Emissions, 2005-2030 (Billion Metric Tons). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data Figure 76. World Energy-Related Carbon Dioxide Emissions by Fuel Type, 1990-2030 (Billion Metric Tons). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data Figure 77. Average Annual Growth in Energy-Related Carbon Dioxide Emissions in the OECD Economies, 2005-2030 (Percent per Year). Need help, contact the National Energy Information Center at 202-586-8800.

394

Breath is a mixture of nitrogen, oxygen, carbon dioxide, water  

E-Print Network [OSTI]

12 SCIENCE Breath is a mixture of nitrogen, oxygen, carbon dioxide, water vapour, inert gases. On the basis of proton affinity, the major constituents of air and breath (nitrogen, oxygen, carbon dioxide

395

A methodology for forecasting carbon dioxide flooding performance  

E-Print Network [OSTI]

A methodology was developed for forecasting carbon dioxide (CO2) flooding performance quickly and reliably. The feasibility of carbon dioxide flooding in the Dollarhide Clearfork "AB" Unit was evaluated using the methodology. This technique is very...

Marroquin Cabrera, Juan Carlos

2012-06-07T23:59:59.000Z

396

Graph Model for Carbon Dioxide Emissions from Metallurgical Plants  

Science Journals Connector (OSTI)

Mathematical models are presented for estimating carbon dioxide emissions from metallurgical processes. The article also presents ... in graph form to calculate transit and net emissions of carbon dioxide based o...

Yu. N. Chesnokov; V. G. Lisienko; A. V. Lapteva

2013-03-01T23:59:59.000Z

397

The Greenness of Cities: Carbon Dioxide Emissions and Urban Development  

E-Print Network [OSTI]

carbon dioxide emissions per 1,000 cubic feet of natural gas. In this case, there is much less energy

Glaeser, Edward L.; Kahn, Matthew E.

2008-01-01T23:59:59.000Z

398

Designed amyloid fibers as materials for selective carbon dioxide capture  

E-Print Network [OSTI]

Designed amyloid fibers as materials for selective carbon dioxide capture Dan Lia,b,c,1 , Hiroyasu demonstrate that amyloids, self-assembling protein fibers, are effective for selective carbon dioxide capture formation rate is fast enough to capture carbon dioxide by dynamic separation, undiminished by the presence

399

Thermal Infrared Radiation and Carbon Dioxide in the Atmosphere  

E-Print Network [OSTI]

dioxide Water vapor #12;Atmospheric composition (parts per million by volume) · Nitrogen (N2) 780Thermal Infrared Radiation and Carbon Dioxide in the Atmosphere Bill Satzer 3M Company #12;Outline,840 · Oxygen (O2) 209,460 · Argon (Ar) 9340 · Carbon dioxide (CO2) 394 · Methane (CH4) 1.79 · Ozone (O3) 0

Olver, Peter

400

World Energy Consumption and Carbon Dioxide Emissions: 1950 2050  

E-Print Network [OSTI]

-U" relation with a within- sample peak between carbon dioxide emissions (and energy use) per capita and perWorld Energy Consumption and Carbon Dioxide Emissions: 1950 Ã? 2050 Richard Schmalensee, Thomas M. Stoker, andRuth A. Judson* Emissions of carbon dioxide from combustion of fossil fuels, which may

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Surface roughness of anodized titanium coatings.  

SciTech Connect (OSTI)

Samples of grade five 6Al4V titanium alloy were coated with two commercial fluoropolymer anodizations (Tiodize and Canadize) and compared. Neither coating demonstrates significant outgassing. The coatings show very similar elemental analysis, except for the presence of lead in the Canadize coating, which may account for its lower surface friction in humid environments. Surface roughness has been compared by SEM, contact profilometry, optical profilometry, power spectral density and bidirectional scattering distribution function (BSDF). The Tiodize film is slightly smoother by all measurement methods, but the Canadize film shows slightly less scatter at all angles of incidence. Both films exhibited initial friction coefficients of 0.2 to 0.4, increasing to 0.4 to 0.8 after 1000 cycles of sliding due to wear of the coating and ball. The coatings are very similar and should behave identically in most applications.

Dugger, Michael Thomas; Chinn, Douglas Alan

2010-10-01T23:59:59.000Z

402

Cleaning graphene with a titanium sacrificial layer  

SciTech Connect (OSTI)

Graphene is a promising material for future electronic applications and chemical vapor deposition of graphene on copper is a promising method for synthesizing graphene on the wafer scale. The processing of such graphene films into electronic devices introduces a variety of contaminants which can be difficult to remove. An approach to cleaning residues from the graphene channel is presented in which a thin layer of titanium is deposited via thermal e-beam evaporation and immediately removed. This procedure does not damage the graphene as evidenced by Raman spectroscopy, greatly enhances the electrical performance of the fabricated graphene field effect transistors, and completely removes the chemical residues from the surface of the graphene channel as evidenced by x-ray photoelectron spectroscopy.

Joiner, C. A., E-mail: cjoiner3@gatech.edu; Roy, T.; Hesabi, Z. R.; Vogel, E. M. [School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States); Chakrabarti, B. [School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States); Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States)

2014-06-02T23:59:59.000Z

403

Waterless TiO{sub 2} atomic layer deposition using titanium tetrachloride and titanium tetraisopropoxide  

SciTech Connect (OSTI)

The surface chemistry for TiO{sub 2} atomic layer deposition (ALD) typically utilizes water or other oxidants that can oxidize underlying substrates such as magnetic disks or semiconductors. To avoid this oxidation, waterless or oxidant-free surface chemistry can be used that involves titanium halides and titanium alkoxides. In this study, waterless TiO{sub 2} ALD was accomplished using titanium tetrachloride (TiCl{sub 4}) and titanium tetraisopropoxide (TTIP). In situ transmission Fourier transform infrared (FTIR) studies were employed to study the surface species and the reactions during waterless TiO{sub 2} ALD. At low temperatures between 125 and 225??°C, the FTIR absorbance spectra revealed that the isopropoxide species remained on the surface after TTIP exposures. The TiCl{sub 4} exposures then removed the isopropoxide species and deposited additional titanium species. At high temperatures between 250 and 300??°C, the isopropoxide species were converted to hydroxyl species by ?-hydride elimination. The observation of propene gaseous reaction product by quadrupole mass spectrometry (QMS) confirmed the ?-hydride elimination reaction pathway. The TiCl{sub 4} exposures then easily reacted with the hydroxyl species. QMS studies also observed the 2-chloropropane and HCl gaseous reaction products and monitored the self-limiting nature of the TTIP reaction. Additional studies examined the waterless TiO{sub 2} ALD growth at low and high temperature. Quartz crystal microbalance measurements observed growth rates of ?3?ng/cm{sup 2} at a low temperature of 150??°C. Much higher growth rates of ?15?ng/cm{sup 2} were measured at a higher temperature of 250??°C under similar reaction conditions. X-ray reflectivity analysis measured a growth rate of 0.55 ± 0.05?Å/cycle at 250??°C. X-ray photoelectron depth-profile studies showed that the TiO{sub 2} films contained low Cl concentrations <1 at. %. This waterless TiO{sub 2} ALD process using TiCl{sub 4} and TTIP should be valuable to prevent substrate oxidation during TiO{sub 2} ALD on oxygen-sensitive substrates.

Anderson, Virginia R.; Cavanagh, Andrew S.; Abdulagatov, Aziz I. [Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215 (United States); Gibbs, Zachary M. [Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309-0424 (United States); George, Steven M., E-mail: Steven.George@Colorado.Edu [Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215 and Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309-0427. (United States)

2014-01-15T23:59:59.000Z

404

Recovery Act: Carbon Dioxide-Water Emulsion for Enhanced Oil Recovery and Permanent Sequestration of Carbon Dioxid  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carbon Dioxide-Water Carbon Dioxide-Water Emulsion for Enhanced Oil Recovery and Permanent Sequestration of Carbon Dioxide Background The U.S. Department of Energy (DOE) distributed a portion of American Recovery and Reinvestment Act (ARRA) funds to advance technologies for chemical conversion of carbon dioxide (CO 2 ) captured from industrial sources. The focus of the research projects is permanent sequestration of CO 2 through mineralization or development

405

CARBON DIOXIDE AND OUR OCEAN LEGACY  

E-Print Network [OSTI]

to energy-consuming activities that burn fossil fuels. On a yearly basis, the average Ameri- can produces 22 of carbon dioxide from the atmosphere, or nearly half of the fossil fuel carbon emissions over this period sea life that depend on the health and avail- ability of these shelled organisms. At present, ocean

406

Predicting Future Atmospheric Carbon Dioxide Levels  

Science Journals Connector (OSTI)

...re-quired 5-Mhz bandwidth...interstellar plasma. For UHF frequencies of 500 Mhz, this amounts...chang-ing the atmospheric carbon dioxide...in the polar areas. Although...The shaded area indicates the...per-missible atmospheric CO2 level might...emission rates are largest between 2000...

U. Siegenthaler; H. Oeschger

1978-01-27T23:59:59.000Z

407

Synthetic fuels, carbon dioxide and climate  

Science Journals Connector (OSTI)

The observed increase in atmospheric carbon dioxide (CO2) has been attributed to the use of fossil fuels. There is concern that the generation and use of synthetic fuels derived from oil shale and coal will accelerate the increase of CO2.

Alex R. Sapre; John R. Hummel; Ruth A. Reck

1982-01-01T23:59:59.000Z

408

Introduction Air Quality and Nitrogen Dioxide  

E-Print Network [OSTI]

- Global update 2005. Primary sources of air pollutants include combustion products from power generationIntroduction Air Quality and Nitrogen Dioxide Air pollution can be defined as "the presence effects to man and/or the environment". (DEFRA) "Clean air is considered to be a basic requirement

409

Hydroelectric Reservoirs -the Carbon Dioxide and Methane  

E-Print Network [OSTI]

Hydroelectric Reservoirs - the Carbon Dioxide and Methane Emissions of a "Carbon Free" Energy an overview on the greenhouse gas production of hydroelectric reservoirs. The goals are to point out the main how big the greenhouse gas emissions from hydroelectric reservoirs are compared to thermo-power plants

Fischlin, Andreas

410

Energy Innovator Drops Costs for Titanium Metalwork | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Innovator Drops Costs for Titanium Metalwork Innovator Drops Costs for Titanium Metalwork Energy Innovator Drops Costs for Titanium Metalwork March 13, 2012 - 12:42pm Addthis Michael Hess Michael Hess Former Digital Communications Specialist, Office of Public Affairs What are the key facts? Iowa Powder Atomization Technology is one of 36 companies that licensed technology under an agreement with the National Lab as part of the America's Next Top Energy Innovator program. Titanium is the stuff aircrafts are made of, at least the important parts. It's an obvious material choice for aircraft engines and airframes with its high strength-to-weight ratio and resistance to corrosion. However, shaping the metal into complex shapes can be expensive. Using a heavier, easier-to-craft metal can be just as expensive because adding weight to an

411

Improve the fatigue life of titanium alloys; Part 1  

SciTech Connect (OSTI)

Heat treatment and mechanical surface treatments of titanium alloys interact in unique ways to allow tailoring of surface microstructures for specific applications. Part 1 of this two-part review discusses the properties of titanium alloys in their various microstructural phases, and Part 2 will describe novel methods for improving fatigue performance by combining mechanical and thermal treatments. Microstructural modification by thermomechanical treatments is widely used to optimize the properties of high-strength titanium alloys for specific applications. However, because the surface of a mechanically loaded titanium part often experiences different conditions than the bulk, it makes sense in many applications to modify only the surface microstructure. By combining thermal treatments with mechanical working, stability of the resulting tailored surface is enhanced. Such stability is especially significant for resistance to fatigue crack nucleation and growth.

Wagner, L. (TU Hamburg-Harburg (Germany)); Gregory, J.K. (GKSS Research Center, Geesthacht (Germany))

1994-03-01T23:59:59.000Z

412

Synthesis and structural properties of lithium titanium oxide powder  

Science Journals Connector (OSTI)

Recently, lithium titanium oxide material has gained renewed interest in electrodes for lithium ion rechargeable batteries. We investigated the influence of excess Li on the structural characteristics of lithium ...

Soo Ho Kim; Kwang Hoon Lee; Baek Seok Seong…

2006-11-01T23:59:59.000Z

413

Low Cost PM Technology for Particle Reinforced Titanium Automotive...  

Broader source: Energy.gov (indexed) [DOE]

Titanium Automotive Components edm2@chrysler.com February 28, 2008 Ti-6Al-4V + 10% TiC Etched Unetched RMI RMI Ti- MMC USAMP AMD 310 - Low Cost PM Technology for Particle...

414

Formation and study of electrospark coatings based on titanium aluminides  

Science Journals Connector (OSTI)

Coatings containing Ti-Al intermetallics are fabricated by the electrospark deposition of titanium on aluminum and aluminum on...3 intermetallic independent of the duration and frequency of discharge pulses. The ...

S. A. Pyachin; A. A. Burkov; V. S. Komarova

2013-05-01T23:59:59.000Z

415

Friction and Wear Enhancement of Titanium Alloy Engine Components...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

7-11, 2010 -- Washington D.C. pm007blau2010o.pdf More Documents & Publications Friction and Wear Enhancement of Titanium Alloy Engine Components Vehicle Technologies Office...

416

DOE Hydrogen Analysis Repository: Carbon Dioxide Compression, Transport,  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carbon Dioxide Compression, Transport, and Storage Carbon Dioxide Compression, Transport, and Storage Project Summary Full Title: Techno-Economic Models for Carbon Dioxide Compression, Transport, and Storage & Correlations for Estimating Carbon Dioxide Density and Viscosity Project ID: 195 Principal Investigator: David McCollum Brief Description: This project addresses several components of carbon capture and storage (CCS) costs, provides technical models for determining the engineering and infrastructure requirements of CCS, and describes some correlations for estimating CO2 density and viscosity. Keywords: Pipeline, transportation, greenhouse gases (GHG), costs, technoeconomic analysis Purpose Estimate costs of carbon dioxide capture, compression, transport, storage, etc., and provide some technical models for determining the engineering and

417

Hydrothermal synthesis of nanocubes of sillenite type compounds for photovoltaic applications and solar energy conversion of carbon dioxide to fuels  

DOE Patents [OSTI]

The present invention relates to formation of nanocubes of sillenite type compounds, such as bismuth titanate, i.e., Bi.sub.12TiO.sub.20, nanocubes, via a hydrothermal synthesis process, with the resulting compound(s) having multifunctional properties such as being useful in solar energy conversion, environmental remediation, and/or energy storage, for example. In one embodiment, a hydrothermal method is disclosed that transforms nanoparticles of TiO.sub.2 to bismuth titanate, i.e., Bi.sub.12TiO.sub.20, nanocubes, optionally loaded with palladium nanoparticles. The method includes reacting titanium dioxide nanotubes with a bismuth salt in an acidic bath at a temperature sufficient and for a time sufficient to form bismuth titanate crystals, which are subsequently annealed to form bismuth titanate nanocubes. After annealing, the bismuth titanate nanocubes may be optionally loaded with nano-sized metal particles, e.g., nanosized palladium particles.

Subramanian, Vaidyanathan; Murugesan, Sankaran

2014-04-29T23:59:59.000Z

418

SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

10-Megawatt Supercritical Carbon 10-Megawatt Supercritical Carbon Dioxide Turbine to someone by E-mail Share SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Facebook Tweet about SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Twitter Bookmark SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Google Bookmark SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Delicious Rank SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on Digg Find More places to share SunShot Initiative: 10-Megawatt Supercritical Carbon Dioxide Turbine on AddThis.com... Concentrating Solar Power Systems Components Competitive Awards CSP Research & Development Thermal Storage CSP Recovery Act Baseload CSP SunShot Multidisciplinary University Research Initiative

419

International Energy Outlook 2006 - Energy-Related Carbon Dioxide Emissions  

Gasoline and Diesel Fuel Update (EIA)

Eneregy-Related Carbon Dioxide Emissions Eneregy-Related Carbon Dioxide Emissions International Energy Outlook 2006 Chapter 7: Energy-Related Carbon Dioxide Emissions In the coming decades, actions to limit greenhouse gas emissions could affect patterns of energy use around the world and alter the level and composition of energy-related carbon dioxide emissions by energy source. Figure 65. World Carbon Dioxide Emissions by Region, 1990-2030 (Billion Metric Tons). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data Figure 66. World Carbon Dioxide Emissions by Fuel Type, 1980-2030 (Billion Metric Tons). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data Carbon dioxide is one of the most prevalent greenhouse gases in the

420

EIA - 2010 International Energy Outlook - Energy-Related Carbon Dioxide  

Gasoline and Diesel Fuel Update (EIA)

Energy-Related Carbon Dioxide Emissions Energy-Related Carbon Dioxide Emissions International Energy Outlook 2010 Energy-Related Carbon Dioxide Emissions In 2007, non-OECD energy-related emissions of carbon dioxide exceeded OECD emissions by 17 percent. In the IEO2010 Reference case, energy-related carbon dioxide emissions from non-OECD countries in 2035 are about double those from OECD countries. Overview Because anthropogenic emissions of carbon dioxide result primarily from the combustion of fossil fuels, world energy use continues to be at the center of the climate change debate. In the IEO2010 Reference case, world energy-related carbon dioxide emissions29 grow from 29.7 billion metric tons in 2007 to 33.8 billion metric tons in 2020 and 42.4 billion metric tons in 2035 (Table 18).30

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Carbon Dioxide Capture Process with Regenerable Sorbents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Dioxide Capture Process with Regenerable Sorbents Dioxide Capture Process with Regenerable Sorbents sorbent material. Additionally, the design of the system incorporates a cross- flow moving-bed reactor where the gas flows horizontally through a "panel" of solid sorbent that is slowly moving down-wards under gravity flow. With the expanded use of fossil fuels expected throughout the world, the increase in CO 2 emissions may prove to contribute even more significantly to global climate change. To address this problem, carbon sequestration scientists and engineers have proposed a number of methods to remove CO 2 from gas streams, such as chemical absorption with a solvent, membrane separation, and cryogenic fractionation. However, all of these methods are expensive and possibly cost-prohibitive for a specific application.

422

Atmospheric Carbon Dioxide Record from Mauna Loa  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SIO Air Sampling Network » Mauna Loa SIO Air Sampling Network » Mauna Loa Atmospheric Carbon Dioxide Record from Mauna Loa DOI: 10.3334/CDIAC/atg.035 graphics Graphics data Data Investigators R.F. Keeling, S.C. Piper, A.F. Bollenbacher and J.S. Walker Carbon Dioxide Research Group Scripps Institution of Oceanography University of California La Jolla, California 92093-0444, U.S.A. Period of Record 1958-2008 Methods Air samples at Mauna Loa are collected continuously from air intakes at the top of four 7-m towers and one 27-m tower. Four air samples are collected each hour for the purpose of determining the CO2 concentration. Determinations of CO2 are made by using a Siemens Ultramat 3 nondispersive infrared gas analyzer with a water vapor freeze trap. This analyzer registers the concentration of CO2 in a stream of air flowing at ~0.5

423

Carbon dioxide utilization and seaweed production  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

dioxide utilization and seaweed production dioxide utilization and seaweed production V.R.P.Sinha World Bank Project Bangladesh Fisheries Research Institute, Mymensingh, Bangladesh e-mails; vrpsinha@ mymensingh.net, vidyut_s@hotmail.com Lowell Fraley L.D. Fraley & Associates, LLC, P.O. Box 1525, Sugarland, TX 77487, USA, e-mail idf@hia.net BS Chowdhry ISS Consultants, Inc. 13111 Westheimer, Suite 303, Houston, Texas 77077, USA, e-mail bsc@issci.com Abstract: Stronger growth in many plants stimulated by increased CO 2 concentration should lead to greater biological productivity with an expected increase in the photosynthetic storage of carbon. Thus, the biosphere will serve as a sink for CO 2 , though it will also act as a source too, because of respiration. Normally net photosynthesis dominates in summer and

424

Coal Bed Sequestration of Carbon Dioxide  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

COAL BED SEQUESTRATION OF CARBON DIOXIDE COAL BED SEQUESTRATION OF CARBON DIOXIDE R. Stanton (rstanton@usgs.gov; 703-648-6462) U.S. Geological Survey MS 956 National Center Reston, VA 20192 R. Flores (rflores@usgs.gov; 303-236-7774) U.S. Geological Survey MS 939, Denver Federal Center Denver, CO 80225 P.D. Warwick (pwarwick@usgs.gov; 703-648-6469) H. Gluskoter (halg@usgs.gov; 703-648-6429) U.S. Geological Survey MS 956 National Center Reston, VA 20192 G.D. Stricker (303-236-7763) U.S. Geological Survey MS 939, Denver Federal Center Denver, CO 80225 Introduction Geologic sequestration of CO 2 generated from fossil fuel combustion may be an environmentally attractive method to reduce the amount of greenhouse gas emissions. Of the geologic options, sequestering CO

425

The urgent need for carbon dioxide sequestration  

SciTech Connect (OSTI)

The danger of global warming has put in question the use of fossil fuels which constitute the most abundant and most reliable energy resource. Meeting the ever growing world demand for cheap energy, while simultaneously achieving the required drastic reduction in CO{sub 2} emissions can only be accomplished by actively preventing carbon dioxide generated in the combustion of fuels from accumulating in the atmosphere, i.e. by sequestration. Sequestration is possible and economically viable and is currently the only realistic solution to the dilemma of CO{sub 2} emissions. The authors have developed a very promising approach that disposes of carbon dioxide by chemically combining it in an exothermic reaction with readily available minerals to form carbonates. The resulting carbonates are stable solids that are known to be environmentally benign and to be stable on geological time scales. This stands in contrast to most other methods that do not appear to fully solve the long term problem.

Lackner, K.S.; Butt, D.P.; Jensen, R.; Ziock, H.

1998-09-01T23:59:59.000Z

426

Carbon Dioxide Emissions from Industrialized Countries  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6 6 Carbon Dioxide Emissions from Industrialized Countries Extended discussion here Carbon emissions per capita 1973 vs. 1991 by major end use. (Denmark comparison is 1972 and 1991) With the third Conference of the Parties (COP-3) in Kyoto approaching, there is a great deal of excitement over policies designed to reduce future carbon dioxide (CO2) emissions from fossil fuels. At COP-3, more than 130 nations will meet to create legally binding targets for CO2 reductions. Accordingly, we have analyzed the patterns of emissions arising from the end uses of energy (and electricity production) in ten industrialized countries, with surprising and, in some cases, worrisome results. The surprise is that emissions in many countries in the early 1990s were lower than in the 1970s in an absolute sense and on a per capita basis; the worry

427

Synthesis of na-doped lithium metatitanate and its absorption for carbon dioxide  

Science Journals Connector (OSTI)

Na-doped lithium metatitanate (Na-doped Li2TiO3) absorbent was doped with Na2CO3 and lithium metatitanate (Li2TiO3) was prepared by a solid-state reaction method from mixture of TiO2 ...

Liu Zhirong, Zhang Huan, Wang Yun, Zhan Xinxing

2014-01-01T23:59:59.000Z

428

Development of a Titanium Dioxide-Supported Platinum Catalyst with Ultrahigh Stability for Polymer Electrolyte Membrane Fuel Cell Applications  

Science Journals Connector (OSTI)

The Pt/TiO2 cathode catalyst exhibited excellent fuel cell performance and ultrahigh stability under accelerated stress test conditions and can be considered as a promising alternative for improving the reliability and durability of PEMFCs. ... The design and synthesis of highly active oxygen reduction reaction (ORR) catalysts with strong durability at low cost is extremely desirable but still remains a significant challenge. ...

Sheng-Yang Huang; Prabhu Ganesan; Sehkyu Park; Branko N. Popov

2009-09-09T23:59:59.000Z

429

Effect of polymer-nanoparticle interactions on the glass transition dynamics and the conductivity mechanism in polyurethane titanium dioxide nanocomposites  

SciTech Connect (OSTI)

We report on the glass transition dynamics and the conductivity properties of a nanodielectric system composed of pre-synthesized TiO{sub 2} nanoparticles embedded in thermoplastic polyurethane. Increase of TiO{sub 2} loading results in enhanced segmental mobility of the composites and less steep temperature dependence, i.e., lower fragility index. The decrease in the fragility index and glass transition temperature is discussed based on the FTIR results. We observe different behavior of conductivity for temperatures above and below the glass transition temperature. At high temperatures the composites exhibit conductivity values more than 2 orders of magnitude higher than those in the pristine matrix. At the same time, at sub-Tg temperatures composites are characterized by superior electrical insulation properties compared to pristine matrix material. Such drastic temperature dependence of the conductivity/insulating ability of the flexible and light-weight, low-Tg composite material can be utilized in various applications including sensing and temperature switching materials.

Polyzos, Georgios [ORNL; Tuncer, Enis [ORNL; Agapov, Alexander L [ORNL; Stevens, Derrick [ORNL; Sokolov, Alexei P [ORNL; Kidder, Michelle [ORNL; Jacobs, [Air Force Research Laboratory, Wright-Patterson AFB, OH; Koerner, Hilmar [Air Force Research Laboratory, Wright-Patterson AFB, OH; Vaia, Richard [Air Force Research Laboratory, Wright-Patterson AFB, OH; More, Karren Leslie [ORNL; Sauers, Isidor [ORNL

2012-01-01T23:59:59.000Z

430

A kinetic and adsorption study of CO oxidation over unsupported fine gold powder and over gold supported on titanium dioxide  

SciTech Connect (OSTI)

The catalytic oxidation of CO with O{sub 2} and adsorption of CO{sub 2} and O{sub 2} on Au deposited on TiO{sub 2} (AuTiO{sub 2}, mean diameter of gold particles 3.5 nm), TiO{sub 2}, and unsupported Au powder (mean diameter 76 nm) have been investigated by using a closed recirculation reaction system. The catalytic oxidation of CO with O{sub 2} on Au/TiO{sub 2} measured at 253--293 K proceeded very rapidly. In the same temperature range, fine gold powder was catalytically active, while TiO{sub 2} alone was entirely inactive for the oxidation. The rate constant of CO oxidation per unit of surface area of gold was larger by two orders of magnitude for Au/TiO{sub 2} than for Au powder. Adsorption of CO and CO{sub 2} occurred almost instantaneously and reversibly on preoxidized Au/TiO{sub 2}, whereas a slow increase in the O{sub 2} pressure was observed at 273 K in the absence of evacuation. A similar increase of O{sub 2} pressure was observed from oxidized TiO{sub 2}, but Au powder did not show any increase. The increase was ascribed to the desorption of weakly adsorbed O{sub 2} on the support surface of Au/TiO{sub 2}. The rate of reduction of preoxidized Au/TiO{sub 2} with CO almost corresponded to the increase in the O{sub 2} pressure and was far smaller than the rate of the catalytic oxidation of CO with O{sub 2} on the catalyst, indicating that molecular oxygen weakly adsorbed on the support surface of Au/TiO{sub 2} contributes only partly to the catalytic oxidation of CO. During the oxidation, O{sub 2} in the gas phase may be directly activated on the surface of deposited gold particles and/or on the very narrow perimeter interface between the gold and the support.

Iizuka, Yasuo; Tode, Toshihisa; Takao, Toshiaki; Yatsu, Kenichiro; Takeuchi, Toshiaki; Tsubota, Susumu; Haruta, Masatake

1999-10-01T23:59:59.000Z

431

Carbon dioxide in Arctic and subarctic regions  

SciTech Connect (OSTI)

A three year research project was presented that would define the role of the Arctic ocean, sea ice, tundra, taiga, high latitude ponds and lakes and polar anthropogenic activity on the carbon dioxide content of the atmosphere. Due to the large physical and geographical differences between the two polar regions, a comparison of CO/sub 2/ source and sink strengths of the two areas was proposed. Research opportunities during the first year, particularly those aboard the Swedish icebreaker, YMER, provided additional confirmatory data about the natural source and sink strengths for carbon dioxide in the Arctic regions. As a result, the hypothesis that these natural sources and sinks are strong enough to significantly affect global atmospheric carbon dioxide levels is considerably strengthened. Based on the available data we calculate that the whole Arctic region is a net annual sink for about 1.1 x 10/sup 15/ g of CO/sub 2/, or the equivalent of about 5% of the annual anthropogenic input into the atmosphere. For the second year of this research effort, research on the seasonal sources and sinks of CO/sub 2/ in the Arctic will be continued. Particular attention will be paid to the seasonal sea ice zones during the freeze and thaw periods, and the tundra-taiga regions, also during the freeze and thaw periods.

Gosink, T. A.; Kelley, J. J.

1981-03-01T23:59:59.000Z

432

Instrument Development and Measurements of the Atmospheric Pollutants Sulfur Dioxide, Nitrate Radical, and Nitrous Acid by Cavity Ring-down Spectroscopy and Cavity Enhanced Absorption Spectroscopy  

E-Print Network [OSTI]

A. , A method of nitrogen dioxide and sulphur dioxidedetermination of nitrogen dioxide and sulfur dioxide in theDOAS) have measured nitrogen dioxide (NO 2 ), nitrate

Medina, David Salvador

2011-01-01T23:59:59.000Z

433

Selective catalytic reduction of NO by NH3 on titanium pillared montmorillonite  

Science Journals Connector (OSTI)

The acidity of a titanium pillared montmorillonite (Ti-PILC) has been modified by two methods of...3 with or without SO2 has been investigated. For the three titanium pillared clays, a high resistance to SO2 pres...

H. L. del Castillo; A. Gil; P. Grange

1996-01-01T23:59:59.000Z

434

Cyclic Strength of Titanium Alloys, Anodized under Micro-Arc Conditions, in Sea Water  

Science Journals Connector (OSTI)

The durability of titanium alloys having undergone micro-arc oxidation and then exposed to sea water is...

G. A. Lavrushin; S. V. Gnedenkov; P. S. Gordienko…

2002-07-01T23:59:59.000Z

435

EA-1336: Ocean Sequestration of Carbon Dioxide Field Experiment,  

Broader source: Energy.gov (indexed) [DOE]

336: Ocean Sequestration of Carbon Dioxide Field Experiment, 336: Ocean Sequestration of Carbon Dioxide Field Experiment, Pittsburgh, Pennsylvania EA-1336: Ocean Sequestration of Carbon Dioxide Field Experiment, Pittsburgh, Pennsylvania SUMMARY This EA evaluates the environmental impacts for the U.S. Department of Energy National Energy Technology Laboratory's proposal to participate with a group of international organizations in an experiment to evaluate the dispersion and diffusion of liquid carbon dioxide droplets in ocean waters. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD May 4, 2001 EA-1336: Finding of No Significant Impact Ocean Sequestration of Carbon Dioxide Field Experiment May 4, 2001 EA-1336: Final Environmental Assessment Ocean Sequestration of Carbon Dioxide Field Experiment

436

Improving Repository Performance by Using DU Dioxide Fill  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DU Dioxide Fill DU Dioxide Fill Improving Repository Performance by Using DU Dioxide Fill Fills may improve repository performance by acting as sacrificial materials, which delay the degradation of SNF uranium dioxide. Because fill and SNF have the same chemical form of uranium (uranium dioxide), the DU dioxide in a repository is the only fill which has the same behavior as that of the SNF. In the natural environment, some uranium ore deposits have remained intact for very long periods of time. The outer parts of the ore deposit degrade while the inner parts of the deposit are protected. The same approach is proposed herein for protecting SNF. The application could use half or more of the DU inventory in the United States. Behavior of Uranium and Potential Behavior of a Waste Package with SNF and Fill

437

Organometallics 1987, 6, 2551-2556 2551 Seven-Coordinate Titanium and Vanadium Carbonyls. Synthesis  

E-Print Network [OSTI]

, with sodium naphthalenide in thf under carbon monoxide gives the titanium(0) carbonyl [~-BUSOrganometallics 1987, 6, 2551-2556 2551 Seven-Coordinate Titanium and Vanadium Carbonyls. Synthesis of the fourfold and threefold faces; the titanium and vanadium structures may also be described in terms of a face

Girolami, Gregory S.

438

Anisotropic electrical resistivity during annealing of oriented columnar titanium films Nicolas MARTIN, 1,2 a)  

E-Print Network [OSTI]

1 Anisotropic electrical resistivity during annealing of oriented columnar titanium films Nicolas of anisotropic electrical resistivity versus temperature of titanium thin films. An oriented titanium film (1 µm. The average DC electrical resistivity changes from 6.03�10-6 to more than 2.40�10-1 m with the increasing

Paris-Sud XI, Université de

439

Titanium diboride-chromium diboride-yttrium titanium oxide ceramic composition and a process for making the same  

DOE Patents [OSTI]

A ceramic composition is described. The ceramic composition consists essentially of from about 84 to 96 w/o titanium diboride, from about 1 to 9 w/o chromium diboride, and from about 3 to about 15 w/o yttrium-titanium-oxide. A method of making the ceramic composition is also described. The method of making the ceramic composition comprises the following steps: Step 1--A consolidated body containing stoichiometric quantities of titanium diboride and chromium diboride is provided. Step 2--The consolidated body is enclosed in and in contact with a thermally insulated package of yttria granules having a thickness of at least 0.5 inches. Step 3--The consolidated body enclosed in the thermally insulated package of yttria granules is heated in a microwave oven with microwave energy to a temperature equal to or greater than 1,900 degrees centigrade to sinter and uniformly disperse yttria particles having a size range from about 1 to about 12 microns throughout the consolidated body forming a densified body consisting essentially of titanium diboride, chromium diboride, and yttrium-titanium-oxide. The resulting densified body has enhanced fracture toughness and hardness.

Holcombe, Cressie E. (Knoxville, TN); Dykes, Norman L. (Oak Ridge, TN)

1991-01-01T23:59:59.000Z

440

Carbon Dioxide Capture by Absorption with Potassium Carbonate  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carbon Dioxide Capture by Absorption Carbon Dioxide Capture by Absorption with Potassium Carbonate Background Although alkanolamine solvents, such as monoethanolamine (MEA), and solvent blends have been developed as commercially-viable options for the absorption of carbon dioxide (CO 2 ) from waste gases, natural gas, and hydrogen streams, further process improvements are required to cost-effectively capture CO 2 from power plant flue gas. The promotion of potassium carbonate (K

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Ultrasonic NDT of titanium diffusion bonding with guided waves  

SciTech Connect (OSTI)

An ultrasonic guided wave technique is developed for the NDT of diffusion bonded titanium-to-titanium structures. A three-layer model based on the normal beam experimental results has been proposed. Dispersion curves and wave structure are analyzed to direct the experimental study. Two features related to Lamb waves propagating in diffusion bonded titanium plates, the spectral peak to peak ratios and the wave mode frequency shift, are extracted from the guided wave experimental results for both 2 mm (0.08 in.) and 4 mm (0.16 in.) diffusion bond panels. It is found for some specific modes and frequencies that these two features are sensitive to the diffusion bonding states and, therefore, could be used to distinguish good bond panels from poor bond ones.

Rose, J.L.; Zhu, W. [Pennsylvania State Univ., University Park, PA (United States). Dept. of Engineering Science and Mechanics; Zaidi, M. [Boeing Co., Long Beach, CA (United States)

1998-04-01T23:59:59.000Z

442

Dissimilar friction welding of titanium alloys to alloy 718  

SciTech Connect (OSTI)

The design of advanced, high-performance gas-turbine engines will require the utilization of elevated-temperature titanium-based materials, including conventional alloys, titanium aluminides, and titanium metal-matrix composites. The most efficient utilization of these materials in the engine compressor section would be achieved by directly joining these materials to existing nickel-base superalloys, such as Alloy 718. To date, the dissimilar welding of titanium alloys to nickel-based alloys has not been common practice because intermetallic compounds form in the weld and cause embrittlement. Special welding techniques must be developed to inhibit this compound formation and to provide high strength welds. In this investigation, a friction welding process was developed for joining titanium alloys (Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V) to nickel-based superalloy Alloy 718. An interlayer system comprised of copper and niobium sheet layers was employed as a diffusion barrier and weld deformation enhancer. A postweld heat treatment (PWHT, 700{degrees}C for 20 min in vacuum) under axial pressure (Ksi) was used to improve the joint strength consistency. The following conclusions can be drawn from this investigation: (1) A friction welding technique has been developed for joining titanium alloys (Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V) to Alloy 718 using an interlayer system of niobium and copper. Joint strengths averaging approximately 50 Ksi were achieved. (2) Deformation was concentrated in the interlayers, especially the copper interlayer, during friction welding. Increased reduction in length (RIL) during friction welding resulted in a decrease in the interlayer thicknesses. (3) The EDS results showed that the niobium and copper interlayers prevent interdiffusion between the two parent metals, producing formation of detrimental phases.

Kuo, M.; Albright, C.E.; Baeslack, W.A. III

1994-12-31T23:59:59.000Z

443

Polyamine-Tethered Porous Polymer Networks for Carbon Dioxide...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Polyamine-Tethered Porous Polymer Networks for Carbon Dioxide Capture from Flue Gas Previous Next List Weigang Lu, Julian P. Sculley, Daqiang Yuan, Rajamani Krishna, Zhangwen Wei,...

444

Carbon Dioxide Capture and Storage Demonstration in Developing...  

Open Energy Info (EERE)

Key Policy Issues and Barriers Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Carbon Dioxide Capture and Storage Demonstration in Developing Countries: Analysis of Key...

445

Synthesis, Structure, and Carbon Dioxide Capture Properties of...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Synthesis, Structure, and Carbon Dioxide Capture Properties of Zeolitic Imidazolate Frameworks Previous Next List Anh Phan, Christian J. Doonan, Fernando J. Uribe-Romo, Carolyn B....

446

Dissociation of carbon dioxide in atmospheric pressure microchannel plasma devices.  

E-Print Network [OSTI]

??Plasma discharge of carbon dioxide at atmospheric pressure was successfully demonstrated in microchannel plasma devices at breakdown voltages lower than 1 kVRMS. Optical emissions of… (more)

Oh, Taegon

2013-01-01T23:59:59.000Z

447

Carbon dioxide sequestration underground laser based detection system.  

E-Print Network [OSTI]

??Carbon dioxide (CO 2) is a known greenhouse gas. Due to the burning of fossil fuels by industrial and power plants the atmospheric concentration of… (more)

Barr, Jamie Lynn.

2009-01-01T23:59:59.000Z

448

Los Alamos probes mysteries of uranium dioxide's thermal conductivity  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of nuclear materials into the hands of terrorists and other non-state actors. The depleted uranium dioxide crystals used for the thermal conductivity measurements were...

449

Carbon dioxide absorbent and method of using the same  

SciTech Connect (OSTI)

In accordance with one aspect, the present invention provides a composition which contains the amino-siloxane structures I, or III, as described herein. The composition is useful for the capture of carbon dioxide from process streams. In addition, the present invention provides methods of preparing the amino-siloxane composition. Another aspect of the present invention provides methods for reducing the amount of carbon dioxide in a process stream employing the amino-siloxane compositions of the invention, as species which react with carbon dioxide to form an adduct with carbon dioxide.

Perry, Robert James; O'Brien, Michael Joseph

2014-06-10T23:59:59.000Z

450

Per Capita Carbon Dioxide Emissions: Convergence or Divergence?  

Science Journals Connector (OSTI)

Understanding and considering the distribution of per capita carbon dioxide (CO2) emissions is important in designing international climate change ... incentives for participation. I evaluate historic internation...

Joseph E. Aldy

2006-04-01T23:59:59.000Z

451

Critical design aspects of dynamic titanium alloy risers  

SciTech Connect (OSTI)

Titanium alloys offer a unique, attractive combination of physical, mechanical, and corrosion properties for design of dynamic, compliant offshore risers. The Ti-6Al-4V ELI alloy, in a beta-transformed condition and with minor ruthenium or palladium additions for chloride resistance above 80 C, represent logical base-case metallic materials for compliant risers. All of the technology and components needed to produce a complete, viable titanium alloy compliant riser system, including pipe, termination designs, joining methods, and coatings are available, and are reviewed in this paper.

Baxter, C.F.; Schutz, R.W. [RMI Titanium Co., Niles, OH (United States)

1996-12-01T23:59:59.000Z

452

Inorganic Hollow Nanotube Aerogels by Atomic Layer Deposition onto Native Nanocellulose Templates  

Science Journals Connector (OSTI)

First we show a preparation method for titanium dioxide, zinc oxide, and aluminum oxide nanotube aerogels based on atomic layer deposition (ALD) on biological nanofibrillar aerogel templates, that is, nanofibrillated cellulose (NFC), also called microfibrillated cellulose (MFC) or nanocellulose. ... Inorganic layer thickness data (S1), larger SEM micrographs of single nanocellulose fibrils (S2), several samples demonstrating differences in preparation methods (S3, S4) and different coatings (S5?S7), XRD data for a TiO2 nanotube film (S8). ... Fabrication of Transparent-Conducting-Oxide-Coated Inverse Opals as Mesostructured Architectures for Electrocatalysis Applications: A Case Study with NiO ...

Juuso T. Korhonen; Panu Hiekkataipale; Jari Malm; Maarit Karppinen; Olli Ikkala; Robin H. A. Ras

2011-03-01T23:59:59.000Z

453

Titanium tritide radioisotope heat source development : palladium-coated titanium hydriding kinetics and tritium loading tests.  

SciTech Connect (OSTI)

We have found that a 180 nm palladium coating enables titanium to be loaded with hydrogen isotopes without the typical 400-500 C vacuum activation step. The hydriding kinetics of Pd coated Ti can be described by the Mintz-Bloch adherent film model, where the rate of hydrogen absorption is controlled by diffusion through an adherent metal-hydride layer. Hydriding rate constants of Pd coated and vacuum activated Ti were found to be very similar. In addition, deuterium/tritium loading experiments were done on stacks of Pd coated Ti foil in a representative-size radioisotope heat source vessel. The experiments demonstrated that such a vessel could be loaded completely, at temperatures below 300 C, in less than 10 hours, using existing department-of-energy tritium handling infrastructure.

Van Blarigan, Peter; Shugard, Andrew D.; Walters, R. Tom (Savannah River National Labs, Aiken, SC)

2012-01-01T23:59:59.000Z

454

Method for extracting and sequestering carbon dioxide  

DOE Patents [OSTI]

A method and apparatus to extract and sequester carbon dioxide (CO.sub.2) from a stream or volume of gas wherein said method and apparatus hydrates CO.sub.2, and reacts the resulting carbonic acid with carbonate. Suitable carbonates include, but are not limited to, carbonates of alkali metals and alkaline earth metals, preferably carbonates of calcium and magnesium. Waste products are metal cations and bicarbonate in solution or dehydrated metal salts, which when disposed of in a large body of water provide an effective way of sequestering CO.sub.2 from a gaseous environment.

Rau, Gregory H. (Castro Valley, CA); Caldeira, Kenneth G. (Livermore, CA)

2005-05-10T23:59:59.000Z

455

Capture of carbon dioxide by hybrid sorption  

DOE Patents [OSTI]

A composition, process and system for capturing carbon dioxide from a combustion gas stream. The composition has a particulate porous support medium that has a high volume of pores, an alkaline component distributed within the pores and on the surface of the support medium, and water adsorbed on the alkaline component, wherein the proportion of water in the composition is between about 5% and about 35% by weight of the composition. The process and system contemplates contacting the sorbent and the flowing gas stream together at a temperature and for a time such that some water remains adsorbed in the alkaline component when the contact of the sorbent with the flowing gas ceases.

Srinivasachar, Srivats

2014-09-23T23:59:59.000Z

456

A Vortex Contactor for Carbon Dioxide Separations  

SciTech Connect (OSTI)

Many analysts identify carbon dioxide (CO2) capture and separation as a major roadblock in efforts to cost effectively mitigate greenhouse gas emissions via sequestration. An assessment 4 conducted by the International Energy Agency (IEA) Greenhouse Gas Research and Development Programme cited separation costs from $35 to $264 per tonne of CO2 avoided for a conventional coal fired power plant utilizing existing capture technologies. Because these costs equate to a greater than 40% increase in current power generation rates, it appears obvious that a significant improvement in CO2 separation technology is required if a negative impact on the world economy is to be avoided.

Raterman, Kevin Thomas; Mc Kellar, Michael George; Turner, Terry Donald; Podgorney, Anna Kristine; Stacey, Douglas Edwin; Stokes, B.; Vranicar, J.

2001-05-01T23:59:59.000Z

457

Increasing the active surface of titanium islands on graphene by nitrogen sputtering  

E-Print Network [OSTI]

Titanium-island formation on graphene as a function of defect density is investigated. When depositing titanium on pristine graphene, titanium atoms cluster and form islands with an average diameter of about 10nm and an average height of a few atomic layers. We show that if defects are introduced in the graphene by ion bombardment, the mobility of the deposited titanium atoms is reduced and the average diameter of the islands decreases to 5nm with monoatomic height. This results in an optimized coverage for hydrogen storage applications since the actual titanium surface available per unit graphene area is significantly increased.

Mashoff, T; Miseikis, V; Coletti, C; Piazza, V; Beltram, F; Heun, S

2014-01-01T23:59:59.000Z

458

Carbon dioxide capture and storage: Seven years after the IPCC special report  

Science Journals Connector (OSTI)

Carbon dioxide capture and storage (CCS) entails separating carbon dioxide from coal-, biomass- or gas ... or other large industrial sources, transporting the carbon dioxide by pipeline, injecting it deep undergr...

Haroon Kheshgi; Heleen de Coninck…

2012-08-01T23:59:59.000Z

459

Retrieval of ozone and nitrogen dioxide concentrations from Stratospheric Aerosol and Gas Experiment III (SAGE III)  

E-Print Network [OSTI]

Retrieval of ozone and nitrogen dioxide concentrations from Stratospheric Aerosol and Gas extinction. We retrieve ozone and nitrogen dioxide number densities and aerosol extinction from transmission), Retrieval of ozone and nitrogen dioxide concentrations from Stratospheric Aerosol and Gas Experiment III

460

6/4/2013 Page 1 of 12 Nitrogen Dioxide SOP Standard Operating Procedures  

E-Print Network [OSTI]

6/4/2013 Page 1 of 12 Nitrogen Dioxide SOP Standard Operating Procedures Nitrogen Dioxide and Nitric Oxide Print a copy and insert into your laboratory the precautions and safe handling procedures for the use of Nitrogen Dioxide

Cohen, Ronald C.

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Satellite observations of ozone and nitrogen dioxide: from retrievals to emission estimates  

E-Print Network [OSTI]

Satellite observations of ozone and nitrogen dioxide: from retrievals to emission estimates #12 Satellite observations of ozone and nitrogen dioxide: from retrievals to emission es- timates / by Bas Subject headings: satellite retrieval / nitrogen dioxide / ozone / air pollution / emis- sion estimates

Haak, Hein

462

Causal Factors of Weld Porosity in Gas Tungsten Arc Welding of Powder Metallurgy Produced Titanium Alloys  

SciTech Connect (OSTI)

ORNL undertook an investigation using gas tungsten arc (GTA) welding on consolidated powder metallurgy (PM) titanium (Ti) plate, to identify the causal factors behind observed porosity in fusion welding. Tramp element compounds of sodium and magnesium, residual from the metallothermic reduction of titanium chloride used to produce the titanium, were remnant in the starting powder and were identified as gas forming species. PM-titanium made from revert scrap where sodium and magnesium were absent, showed fusion weld porosity, although to a lesser degree. We show that porosity was attributable to hydrogen from adsorbed water on the surface of the powders prior to consolidation. The removal / minimization of both adsorbed water on the surface of titanium powder and the residues from the reduction process prior to consolidation of titanium powders, are critical to achieve equivalent fusion welding success similar to that seen in wrought titanium produced via the Kroll process.

Muth, Thomas R [ORNL; Yamamoto, Yukinori [ORNL; Frederick, David Alan [ORNL; Contescu, Cristian I [ORNL; Chen, Wei [ORNL; Lim, Yong Chae [ORNL; Peter, William H [ORNL; Feng, Zhili [ORNL

2013-01-01T23:59:59.000Z

463

Carbon dioxide adsorption and methanation on ruthenium  

SciTech Connect (OSTI)

The adsorption and methanation of carbon dioxide on a ruthenium-silica catalyst were studied using temperature-programmed desorption (TPD) and temperature-programmed reaction (TPR). Carbon dioxide adsorption was found to be activated; CO/sub 2/ adsorption increased significantly as the temperature increased from 298 to 435 K. During adsorption, some of the CO/sub 2/ dissociated to carbon monoxide and oxygen; upon hydrogen exposure at room temperature, the oxygen reacted to water. Methanation of adsorbed CO and of adsorbed CO/sub 2/, using TPR in flowing hydrogen, yielded a CH/sub 4/ peak with a peak temperature of 459 K for both adsorbates, indicating that both reactions follow the same mechanism after adsorption. This peak temperature did not change with initial surface coverage of CO, indicating that methanation is first order in CO coverage. The desorption and reaction spectra for Ru/SiO/sub 2/ were similar to those previously obtained for Ni/SiO/sub 2/, but both CO/sub 2/ formation and CH/sub 4/ formation proceeded faster on Ru. Also, the details of CO desorption and the changes in CO/sub 2/ and CO desorptions with initial coverage were different on the two metals. 5 figures, 3 tables.

Zagli, E.; Falconer, J.L.

1981-05-01T23:59:59.000Z

464

Frequency stabilization of a Titanium-Sapphire laser for  

E-Print Network [OSTI]

Frequency stabilization of a Titanium-Sapphire laser for precision spectroscopy on Calcium ions . . . . . . . . . . . . . . . . . . . . . . . 53 5.3.2 In-loop error signal . . . . . . . . . . . . . . . . . . . . . . 56 6 Laser linewidth 59 6.1 Performance estimation with the in-loop error signal . . . . . . . 59 6.1.1 Theoretical description

Blatt, Rainer

465

Degradation mode survey of titanium-base alloys  

SciTech Connect (OSTI)

Of the materials reviewed, commercially pure titanium, Ti Gr 2, is the most susceptible to crevice corrosion. Ti Gr 7, 12, and 16 are likely to be resistant to crevice corrosion under the current expected Yucca Mountain repository conditions. Although Grade 7 has the greatest resistance to crevice corrosion it is also the most expensive. Although the possibility of sustained loads cracking exists, it has not yet been observed in a Ti alloys. For hydride precipitation to occur 100{degrees}C, the hydrogen concentration would need to be relatively high, much higher than the maximum amount of hydrogen allowed during the manufacture of ({alpha} Ti alloys (0.0 15 wt%). A large amount of (SCC) stress corrosion cracking data accumulated at SNL and BNL for the WIPP program and by the Canadian Waste Management Program on titanium grades 2 and 12 indicates that there is no SCC at naturally occurring potentials in various brines. Hydride-induced cracking of titanium is a possibility and therefore, further investigation of this phenomenon under credible repository conditions is warranted. One disadvantage of titanium and its alloys is that their strengths decrease rather rapidly with temperature. This is due to the strong temperature dependence of interstitial solute strengthening mechanisms. Ti Gr 12 and 16 are recommended for further consideration as candidate materials for high level nuclear waste containers.

Gdowski, G.E. [Lawrence Livermore National Lab., CA (United States); Ahluwalia, H.S. [Science and Engineering Associates, Inc., Livermore, CA (United States)

1995-01-30T23:59:59.000Z

466

Titanium Enolates of Thiazolidinethione Chiral Auxiliaries: Versatile Tools for  

E-Print Network [OSTI]

extensively and are now an important and general method for asymmetric carbon-carbon bond forma- tion.1 of titanium tetrachloride and nature of the amine employed.3 However, more easily cleavable auxiliaries than by conversion of the amino alcohol to the thiazolidinethione by exposure to carbon disulfide and 1 M KOH6

467

EIA - International Energy Outlook 2009-Energy-Related Carbon Dioxide  

Gasoline and Diesel Fuel Update (EIA)

Energy-Related Carbon Dioxide Emissions Energy-Related Carbon Dioxide Emissions International Energy Outlook 2009 Chapter 8 - Energy-Related Carbon Dioxide Emissions In 2006, non-OECD energy-related emissions of carbon dioxide exceeded OECD emissions by 14 percent. In 2030, energy-related carbon dioxide emissions from the non-OECD countries are projected to exceed those from the OECD countries by 77 percent. Figure 80. World Energy-Related Carbon Dioxide Emissions, 2006-2030 (Billion Metric Tons). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data Figure 81. World Energy-Related Carbon Dioxide Emissions by Fuel Type, 1990-2030 (Billion Metric Tons). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data Figure 82. U.S. Energy-Related Carbon Dioxide Emissions by Fuel in IEO2008 and IEO2009, 2006, 2015, and 2030 (billion metric tons). Need help, contact the National Energy Information Center at 202-586-8800.

468

Carbon Dioxide Capture DOI: 10.1002/anie.200902836  

E-Print Network [OSTI]

Carbon Dioxide Capture DOI: 10.1002/anie.200902836 Highly Selective CO2 Capture in Flexible 3D Coordination Polymer Networks** Hye-Sun Choi and Myunghyun Paik Suh* Carbon dioxide capture has been warming, and the development of efficient methods for capturing CO2 from industrial flue gas has become

Paik Suh, Myunghyun

469

Carbon Dioxide Capture by Chemical Absorption: A Solvent Comparison Study  

E-Print Network [OSTI]

1 Carbon Dioxide Capture by Chemical Absorption: A Solvent Comparison Study by Anusha Kothandaraman Students #12;2 #12;3 Carbon Dioxide Capture by Chemical Absorption: A Solvent Comparison Study by Anusha with electricity generation accounting for 40% of the total1 . Carbon capture and sequestration (CCS) is one

470

Pilot Plant Study of Carbon Dioxide Capture by Aqueous Monoethanolamine  

E-Print Network [OSTI]

i Pilot Plant Study of Carbon Dioxide Capture by Aqueous Monoethanolamine Topical Report Prepared Pilot Plant Study of Carbon Dioxide Capture by Aqueous Monoethanolamine Ross Edward Dugas, M capture using monoethanolamine (MEA). MEA is an appropriate choice for a baseline study since

Rochelle, Gary T.

471

Carbon Dioxide Capture DOI: 10.1002/anie.201000431  

E-Print Network [OSTI]

Carbon Dioxide Capture DOI: 10.1002/anie.201000431 Carbon Dioxide Capture: Prospects for New] Carbon capture and storage (CCS) schemes embody a group of technologies for the capture of CO2 from power to the atmosphere could be reduced by 80­90% for a modern conventional power plant equipped with carbon capture

472

Exhaust Gas Sensor Based On Tin Dioxide For Automotive Application  

E-Print Network [OSTI]

Exhaust Gas Sensor Based On Tin Dioxide For Automotive Application Arthur VALLERON a,b , Christophe, Engineering Materials Department The aim of this paper is to investigate the potentialities of gas sensor based on semi-conductor for exhaust gas automotive application. The sensing element is a tin dioxide

Paris-Sud XI, Université de

473

Carbon dioxide sequestration in concrete in different curing environments  

E-Print Network [OSTI]

Carbon dioxide sequestration in concrete in different curing environments Y.-m. Chun, T.R. Naik, USA ABSTRACT: This paper summarizes the results of an investigation on carbon dioxide (CO2) sequestration in concrete. Concrete mixtures were not air entrained. Concrete mixtures were made containing

Wisconsin-Milwaukee, University of

474

Method for Increasing Atmospheric Carbon Dioxide in Bacteriological Incubators  

Science Journals Connector (OSTI)

...Method for Increasing Atmospheric Carbon Dioxide in...Method for Increasing Atmospheric Carbon Dioxide in...experience with water-jacket incubators...that the area of water used be the maximum...does not create condensation. For culturing...was made of the recovery of Mycobacterium...

Alfred G. Karslon; Patrick E. Caskey

1969-07-01T23:59:59.000Z

475

Carbon Dioxide, Global Warming, and Michael Crichton's "State of Fear"  

E-Print Network [OSTI]

Carbon Dioxide, Global Warming, and Michael Crichton's "State of Fear" Bert W. Rust Mathematical- tioned the connection between global warming and increasing atmospheric carbon dioxide by pointing out of these plots to global warming have spilled over to the real world, inviting both praise [4, 17] and scorn [15

Rust, Bert W.

476

Absorption of Carbon Dioxide in Aqueous Piperazine/Methyldiethanolamine  

E-Print Network [OSTI]

Absorption of Carbon Dioxide in Aqueous Piperazine/Methyldiethanolamine Sanjay Bishnoi and Gary T dioxide absorption in 0.6 M piperazine PZ r4 M methyldiethanolamine ( )MDEA was measured in a wetted wall loading. The absorption rate did not follow pseudo first-order beha®ior except at ®ery low loading. All

Rochelle, Gary T.

477

Carbon dioxide emission during forest fires ignited by lightning  

E-Print Network [OSTI]

In this paper we developed the model for the carbon dioxide emission from forest fire. The master equation for the spreading of the carbon dioxide to atmosphere is the hyperbolic diffusion equation. In the paper we study forest fire ignited by lightning. In that case the fores fire has the well defined front which propagates with finite velocity.

Magdalena Pelc; Radoslaw Osuch

2009-03-31T23:59:59.000Z

478

ORNL/CDIAC-143 CARBON DIOXIDE, HYDROGRAPHIC, AND CHEMICAL DATA OBTAINED DURING THE  

E-Print Network [OSTI]

Kozyr Carbon Dioxide Information Analysis Center Oak Ridge National Laboratory Oak Ridge, Tennessee, U Prepared by the Carbon Dioxide Information Analysis Center OAK RIDGE NATIONAL LABORATORY Oak Ridge

479

Faraday rotation spectroscopy of nitrogen dioxide based on a widely tunable external cavity quantum cascade laser  

E-Print Network [OSTI]

Faraday rotation spectroscopy of nitrogen dioxide based on a widely tunable external cavity quantum: Faraday Rotation Spectroscopy, external-cavity quantum cascade laser, nitrogen dioxide, trace

480

Synchrotron X-ray Studies of Super-critical Carbon Dioxide /...  

Broader source: Energy.gov (indexed) [DOE]

Synchrotron X-ray Studies of Super-critical Carbon Dioxide Reservoir Rock Interfaces Synchrotron X-ray Studies of Super-critical Carbon Dioxide Reservoir Rock Interfaces...

Note: This page contains sample records for the topic "titanium dioxide tio2" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Carbon Dioxide Heat Pump Water Heater Research Project | Department of  

Broader source: Energy.gov (indexed) [DOE]

Emerging Technologies » Carbon Dioxide Heat Pump Water Heater Emerging Technologies » Carbon Dioxide Heat Pump Water Heater Research Project Carbon Dioxide Heat Pump Water Heater Research Project The U.S. Department of Energy is currently conducting research into carbon dioxide (CO2) heat pump water heaters. This project will employ innovative techniques to adapt water heating technology to meet U.S. market requirements, including specifications, cost, and performance targets. Carbon dioxide is a refrigerant with a global warming potential (GWP) of 1. The CO2 heat pump water heater research seeks to develop an improved life cycle climate performance compared to conventional refrigerants. For example, R134a, another type of refrigerant, has a GWP of 1,300. Project Description This project seeks to develop a CO2-based heat pump water heater (HPWH)

482

Microbial Sequestration of Carbon Dioxide and Subsequent Conversion to Methane  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sequestration of Carbon Dioxide and Subsequent Sequestration of Carbon Dioxide and Subsequent conversion to Methane By Nirupam Pal Associate Professor California Polytechnic State University San Luis Obispo, CA 93401 Email : npal@calpoly.edu Phone : (805) 756-1355 INTRODUCTION The rising level of carbon dioxide in the atmosphere has been of growing concern in recent years. The increasing levels of carbon dioxide, the most dominant component of greenhouse gases, contribute to global warming and changing global weather patterns which could potentially lead to catastrophic events that could threaten life in every form on this planet. The level of carbon dioxide in the worlds atmosphere has increased from about 280 ppm in 1850 to the current level of approximately 350 ppm. There are several natural sources and sinks of

483

DOE Report Assesses Potential for Carbon Dioxide Storage Beneath Federal  

Broader source: Energy.gov (indexed) [DOE]

Report Assesses Potential for Carbon Dioxide Storage Beneath Report Assesses Potential for Carbon Dioxide Storage Beneath Federal Lands DOE Report Assesses Potential for Carbon Dioxide Storage Beneath Federal Lands May 14, 2009 - 1:00pm Addthis Washington, DC - As a complementary document to the U.S. Department of Energy's Carbon Sequestration Atlas of the United States and Canada issued in November 2008, the Office of Fossil Energy's National Energy Technology Laboratory has now released a report that provides an initial estimate of the potential to store carbon dioxide (CO2) underneath millions of acres of Federal lands. The report, Storage of Captured Carbon Dioxide Beneath Federal Lands, estimates and characterizes the storage potential that lies beneath some of the more than 400 million acres of Federal land available for lease.

484

Innovative Concepts for Beneficial Reuse of Carbon Dioxide | Department of  

Broader source: Energy.gov (indexed) [DOE]

Innovative Concepts for Beneficial Reuse of Carbon Dioxide Innovative Concepts for Beneficial Reuse of Carbon Dioxide Innovative Concepts for Beneficial Reuse of Carbon Dioxide Funding for 12 projects to test innovative concepts for the beneficial use of carbon dioxide (CO2) was announced by the U.S. Department of Energy. The awards are part of $1.4 billion in funding from the American Recovery and Reinvestment Act (ARRA) for projects that will capture carbon dioxide from industrial sources. These 12 projects will engage in a first phase feasibility study that will examine beneficial uses in a variety of ways, including mineralization to carbonates directly through conversion of CO2 in flue gas; the use of CO2 from power plants or industrial applications to grow algae/biomass; and conversion of CO2 to fuels and chemicals. Each project will be subject to

485

Carbon dioxide absorbent and method of using the same  

DOE Patents [OSTI]

In accordance with one aspect, the present invention provides an amino-siloxane composition comprising at least one of structures I, II, III, IV or V said compositions being useful for the capture of carbon dioxide from gas streams such as power plant flue gases. In addition, the present invention provides methods of preparing the amino-siloxane compositions are provided. Also provided are methods for reducing the amount of carbon dioxide in a process stream employing the amino-siloxane compositions of the invention as species which react with carbon dioxide to form an adduct with carbon dioxide. The reaction of the amino-siloxane compositions provided by the present invention with carbon dioxide is reversible and thus, the method provides for multicycle use of said compositions.

Perry, Robert James (Niskayuna, NY); Lewis, Larry Neil (Scotia, NY); O'Brien, Michael Joseph (Clifton Park, NY); Soloveichik, Grigorii Lev (Latham, NY); Kniajanski, Sergei (Clifton Park, NY); Lam, Tunchiao Hubert (Clifton Park, NY); Lee, Julia Lam (Niskayuna, NY); Rubinsztajn, Malgorzata Iwona (Ballston Spa, NY)

2011-10-04T23:59:59.000Z

486

Haverford Researchers Create Carbon Dioxide-Separating Polymer  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Haverford College Haverford College Researchers Create Carbon Dioxide-Separating Polymer Haverford College Researchers Create Carbon Dioxide-Separating Polymer August 1, 2012 | Tags: Basic Energy Sciences (BES), Chemistry, Hopper Rebecca Raber, rraber@haverford.edu, +1 610 896 1038 gtoc.jpg Carbon dioxide gas separation is important for many environmental and energy applications. Molecular dynamics simulations are used to characterize a two-dimensional hydrocarbon polymer, PG-ES1, that uses a combination of surface adsorption and narrow pores to separate carbon dioxide from nitrogen, oxygen, and methane gases. Image by Joshua Schrier, Haverford College. Carbon dioxide is the primary greenhouse gas emitted through human activities, such as the combustion of fossil fuels for energy and

487

Nitrogen dioxide and respiratory illness in children. Part II: Assessment of exposure to nitrogen dioxide  

SciTech Connect (OSTI)

Repeated measurements of nitrogen dioxide were obtained from 1988 to 1991 in the homes of 1,205 infants living in Albuquerque, NM. Passive diffusion samplers were used to obtain a series of two-week integrated measurements from the home of each infant for use in a cohort study of the relation of residential exposure to nitrogen dioxide and respiratory illnesses. Information on stove use and time spent inside the residence was collected at two-week and two-month intervals, respectively. During the winter, in the bedrooms of homes with gas cooking stoves, mean nitrogen dioxide concentrations were 21 parts per billion (ppb); mean concentrations in the living room and kitchen were 29 ppb and 34 ppb, respectively. In homes with electric cooking stoves, the mean bedroom concentration was 7 ppb during the winter. Lower indoor concentrations were observed during the summer in homes with both gas and electric stoves. On average, infants spent approximately 12.3 hours per day in their bedrooms, 7.3 hours in the living rooms, 35 minutes in the kitchens, and 3.8 hours out of their homes. (As a condition of participation, none of the infants spent more than 20 hours per week in day care outside of their homes). The mean time infants spent in the kitchen during cooking was approximately nine minutes per day. We tested whether exposures of infants living in homes with gas stoves could be reasonably estimated by measurements in the bedroom in comparison with time-weighted average concentrations based on time-activity data and simultaneous nitrogen dioxide measurements in the kitchen, living room, and bedroom. In 1,937 two-week intervals from 587 infants, 90% of time-weighted exposure (on the three-level classification used in this study) estimates were in agreement with estimates based on bedroom concentrations alone.

Lambert, W.E.; Samet, J.M.; Hunt, W.C.; Skipper, B.J.; Schwab, M.; Spengler, J.D. (Univ. of New Mexico Medical Center, Albuquerque (United States))

1993-06-01T23:59:59.000Z

488

Layered solid sorbents for carbon dioxide capture  

DOE Patents [OSTI]

A solid sorbent for the capture and the transport of carbon dioxide gas is provided having at least one first layer of a positively charged material that is polyethylenimine or poly(allylamine hydrochloride), that captures at least a portion of the gas, and at least one second layer of a negatively charged material that is polystyrenesulfonate or poly(acryclic acid), that transports the gas, wherein the second layer of material is in juxtaposition to, attached to, or crosslinked with the first layer for forming at least one bilayer, and a solid substrate support having a porous surface, wherein one or more of the bilayers is/are deposited on the surface of and/or within the solid substrate. A method of preparing and using the solid sorbent is provided.

Li, Bingyun; Jiang, Bingbing; Gray, McMahan L; Fauth, Daniel J; Pennline, Henry W; Richards, George A

2014-11-18T23:59:59.000Z

489

The lifetime of excess atmospheric carbon dioxide  

SciTech Connect (OSTI)

Since the beginning of the industrial revolution human activity has significantly altered biogeochemical cycling on a global scale. The uncertainties of future climate change rests partly on issues of physical-climate system dynamics and their representation in general circulation models. However understanding the carbon cycle is a key to comprehending the changing terrestrial biosphere and to developing a reasonable range of future concentrations of greenhouse gases. The authors look at correction of model uncertainties in the examination of the lifetime of carbon dioxide. The two difficulties analysed are as follows: (1) most model-derived estimates of the relaxation of the concentration of CO2 reveal a function which is not always well approximated by weighted sums of exponentials; (2) the function c(t) is quite sensitive to assumptions about the terrestrial biosphere and the relaxation experiment. 51 refs., 15 figs., 7 tabs.

Moore, B. III; Braswell, B.H. (Univ. of New Hampshire, Durham, NH (United States))

1994-03-01T23:59:59.000Z

490

Intraosseous Venography with Carbon Dioxide in Percutaneous Vertebroplasty: Carbon Dioxide Retention in Renal Veins  

SciTech Connect (OSTI)

The objective of the present study was to determine the frequency of gas retention in the renal vein following carbon dioxide intraosseous venography in the prone position and, while citing references, to examine its onset mechanisms. All percutaneous vertebroplasties performed at our hospital from January to December 2005 were registered and retrospectively analyzed. Of 43 registered procedures treating 79 vertebrae, 28 procedures treating 54 vertebrae were analyzed. Vertebral intraosseous venography was performed using carbon dioxide as a contrast agent in all percutaneous vertebroplasty procedures. In preoperative and postoperative vertebral CT, gas retention in the renal vein and other areas was assessed. Preoperative CT did not show gas retention (0/28 procedures; 0%). Postoperative CT confirmed gas retention in the renal vein in 10 of the 28 procedures (35.7%). Gas retention was seen in the right renal vein in 8 procedures (28.6%), in the left renal vein in 5 procedures (17.9%), in the left and right renal veins in 3 procedures (10.7%), in vertebrae in 22 procedures (78.6%), in the soft tissue around vertebrae in 14 procedures (50.0%), in the spinal canal in 12 procedures (42.9%), and in the subcutaneous tissue in 5 procedures (17.9%). In conclusion, in our study, carbon dioxide gas injected into the vertebra frequently reached and remained in the renal vein.

Komemushi, Atsushi, E-mail: kome64@yo.rim.or.jp; Tanigawa, Noboru; Kariya, Shuji; Kojima, Hiroyuki; Shomura, Yuzo; Tokuda, Takanori; Nomura, Motoo; Terada, Jiro; Kamata, Minoru; Sawada, Satoshi [Kansai Medical University, Department of Radiology (Japan)

2008-11-15T23:59:59.000Z

491

Coiled tubing drilling with supercritical carbon dioxide  

DOE Patents [OSTI]

A method for increasing the efficiency of drilling operations by using a drilling fluid material that exists as supercritical fluid or a dense gas at temperature and pressure conditions existing at a drill site. The material can be used to reduce mechanical drilling forces, to remove cuttings, or to jet erode a substrate. In one embodiment, carbon dioxide (CO.sub.2) is used as the material for drilling within wells in the earth, where the normal temperature and pressure conditions cause CO.sub.2 to exist as a supercritical fluid. Supercritical carbon dioxide (SC--CO.sub.2) is preferably used with coiled tube (CT) drilling equipment. The very low viscosity SC--CO.sub.2 provides efficient cooling of the drill head, and efficient cuttings removal. Further, the diffusivity of SC--CO.sub.2 within the pores of petroleum formations is significantly higher than that of water, making jet erosion using SC--CO.sub.2 much more effective than water jet erosion. SC--CO.sub.2 jets can be used to assist mechanical drilling, for erosion drilling, or for scale removal. A choke manifold at the well head or mud cap drilling equipment can be used to control the pressure within the borehole, to ensure that the temperature and pressure conditions necessary for CO.sub.2 to exist as either a supercritical fluid or a dense gas occur at the drill site. Spent CO.sub.2 can be vented to the atmosphere, collected for reuse, or directed into the formation to aid in the recovery of petroleum.

Kolle , Jack J. (Seattle, WA)

2002-01-01T23:59:59.000Z

492

Estimated Carbon Dioxide Emissions in 2008: United States  

SciTech Connect (OSTI)

Flow charts depicting carbon dioxide emissions in the United States have been constructed from publicly available data and estimates of state-level energy use patterns. Approximately 5,800 million metric tons of carbon dioxide were emitted throughout the United States for use in power production, residential, commercial, industrial, and transportation applications in 2008. Carbon dioxide is emitted from the use of three major energy resources: natural gas, coal, and petroleum. The flow patterns are represented in a compact 'visual atlas' of 52 state-level (all 50 states, the District of Columbia, and one national) carbon dioxide flow charts representing a comprehensive systems view of national CO{sub 2} emissions. Lawrence Livermore National Lab (LLNL) has published flow charts (also referred to as 'Sankey Diagrams') of important national commodities since the early 1970s. The most widely recognized of these charts is the U.S. energy flow chart (http://flowcharts.llnl.gov). LLNL has also published charts depicting carbon (or carbon dioxide potential) flow and water flow at the national level as well as energy, carbon, and water flows at the international, state, municipal, and organizational (i.e. United States Air Force) level. Flow charts are valuable as single-page references that contain quantitative data about resource, commodity, and byproduct flows in a graphical form that also convey structural information about the system that manages those flows. Data on carbon dioxide emissions from the energy sector are reported on a national level. Because carbon dioxide emissions are not reported for individual states, the carbon dioxide emissions are estimated using published energy use information. Data on energy use is compiled by the U.S. Department of Energy's Energy Information Administration (U.S. EIA) in the State Energy Data System (SEDS). SEDS is updated annually and reports data from 2 years prior to the year of the update. SEDS contains data on primary resource consumption, electricity generation, and energy consumption within each economic sector. Flow charts of state-level energy usage and explanations of the calculations and assumptions utilized can be found at: http://flowcharts.llnl.gov. This information is translated into carbon dioxide emissions using ratios of carbon dioxide emissions to energy use calculated from national carbon dioxide emissions and national energy use quantities for each particular sector. These statistics are reported annually in the U.S. EIA's Annual Energy Review. Data for 2008 (US. EIA, 2010) was updated in August of 2010. This is the first presentation of a comprehensive state-level package of flow charts depicting carbon dioxide emissions for the United States.

Smith, C A; Simon, A J; Belles, R D

2011-04-01T23:59:59.000Z

493

Terpolymerization of ethylene, sulfur dioxide and carbon monoxide  

DOE Patents [OSTI]

This invention relates to a high molecular weight terpolymer of ethylene, sulfur dioxide and carbon monoxide stable to 280.degree. C. and containing as little as 36 mol % ethylene and about 41-51 mol % sulfur dioxide; and to the method of producing said terpolymer by irradiation of a liquid and gaseous mixture of ethylene, sulfur dioxide and carbon monoxide by means of Co-60 gamma rays or an electron beam, at a temperature of about 10.degree.-50.degree. C., and at a pressure of about 140 to 680 atmospheres, to initiate polymerization.

Johnson, Richard (Shirley, NY); Steinberg, Meyer (Huntington Station, NY)

1981-01-01T23:59:59.000Z

494

Energy loss characteristics of heavy ions in nitrogen, carbon dioxide, argon, hydrocarbon gases and tradescantia tissue  

E-Print Network [OSTI]

Energy loss characteristics of heavy ions in nitrogen, carbon dioxide, argon, hydrocarbon gases and tradescantia tissue

Dennis, J A

1971-01-01T23:59:59.000Z

495

Storage of Hydrogen, Methane, and Carbon Dioxide in Highly Porous Covalent Organic Frameworks for Clean Energy  

E-Print Network [OSTI]

, and carbon dioxide. Introduction Carbon dioxide emissions resulting from the burning of fossil fuels 20 metric tons of carbon dioxide per capita are released annually into the atmosphere.1a,b CarbonStorage of Hydrogen, Methane, and Carbon Dioxide in Highly Porous Covalent Organic Frameworks

Yaghi, Omar M.

496

Molecular dynamics simulation of hydrogen diffusion in titanium  

National Nuclear Security Administration (NNSA)

9: Computation Physics 9: Computation Physics Atomistic Simulation of Hydrogen Diffusion in Titanium. Alexandr S. Rokhmanenkov, Alexey Yu. Kuksin, and Vladimir V. Stegailov All-Russia Research Institute of Automatics, Moscow 125412, Russia rohmanenkov@gmail.com Summary Study of the behavior of hydrogen in metals and alloys. The study is based on classical molecular dynamics (MD) and density functional theory (DFT) calculations. Study of the behavior of hydrogen in metals and alloys is of great importance due to the practical uses of hydrogen-metal systems for absorption of nuclear radiation, in neutron sources, for storage of hydrogen, or as catalyzers. This work is devoted to atomistic simulation of hydrogen diffusion in titanium hydrides and the effect of stresses and lattice defects on diffusivity.

497

High-Resolution Soft X-Ray Spectral Analysis in the CK Region of Titanium Carbide (TiC) using the DV-X alpha Molecular Orbital Method  

E-Print Network [OSTI]

in the CK Region of Titanium Carbide (TiC) using the DV-X?USA Keyword titanium carbide, soft X-ray spectroscopy,C K region of titanium carbide (TiC). The spectral profiles

Shimomura, Kenta

2010-01-01T23:59:59.000Z

498

Work hardening characteristics and recovery of gamma base titanium aluminides  

SciTech Connect (OSTI)

The work hardening behavior of gamma base titanium aluminides was investigated by mechanical testing, electron microscope observations and recovery experiments. The main objectives of the paper are: (1) to ascertain the nature of work hardening at room temperature, (2) to identify deformation induced glide obstacles which can be overcome with the aid of thermal activation, (3) to assess the thermal stability of deformation induced defect structures.

Appel, F.; Sparka, U.; Muellauer, J.

1999-07-01T23:59:59.000Z

499

Intermetallic and titanium matrix composite materials for hypersonic applications  

SciTech Connect (OSTI)

As part of the French Program of Research and Technology for Advanced Hypersonic Propulsion (PREPHA) which was launched in 1992 between Aerospatiale, Dassault Aviation, ONERA, SNECMA and SEP, an important work is specially devoted to the development of titanium and intermetallic composite materials for large airframe structures. At Dassault Aviation, starting from a long experience in Superplastic Forming - Diffusion Bonding (SPF-DB) of titanium parts, the effort is brought on the manufacturing and characterization of composites made from Timet beta 21S or IMI 834 foils and Textron SCS6 fiber fabrics. At `Aersopatiale Espace & Defence`, associated since a long time about intermetallic composite materials with university research laboratories, the principal effort is brought on plasma technology to develop the gamma titanium aluminide TiAl matrix composite reinforced by protected silicon carbide fibers (BP SM 1240 or TEXTRON SCS6). The objective, is to achieve, after 3 years of time, to elaborate a medium size integrally stiffened panel (300 x 600 sq mm).

Berton, B.; Surdon, G.; Colin, C. [Dassault Aviation, Saint-Cloud (France)]|[Aersopatiale Space & Defence, St Medard en Jalles (France)

1995-09-01T23:59:59.000Z

500

Innovative Geothermal Startup Will Put Carbon Dioxide To Good Use |  

Broader source: Energy.gov (indexed) [DOE]

Geothermal Startup Will Put Carbon Dioxide To Good Use Geothermal Startup Will Put Carbon Dioxide To Good Use Innovative Geothermal Startup Will Put Carbon Dioxide To Good Use March 17, 2011 - 2:09pm Addthis A basic overview of GreenFire's process to convert CO2 into electricity. | Photo courtesy of GreenFire. A basic overview of GreenFire's process to convert CO2 into electricity. | Photo courtesy of GreenFire. JoAnn Milliken What does this project do? GreenFire Energy will conduct the first field demonstration of a CO2-based geothermal system. Getting geothermal power with CO2 instead of water would be particularly beneficial in the arid Southwestern U.S., where water is scarce. Geothermal power holds enormous opportunities to provide affordable, clean energy that avoids greenhouse gases like carbon dioxide (CO2). That's